How to write this math problem, if you know, please tell me quickly, thank you

Let the length of the original cuboid be x: x width: y height: z

According to the inscription, if the length is reduced by 2 cm, the width and height are the same, its volume is reduced by 48 cubic centimeters yz=24

If the width is increased by 3 cm, the length and height are the same, its volume increases by 99 cubic centimeters xz=33 If the height is increased by 4 cm, the length and width are the same, its volume increases by 352 cubic decimeters xy=88

x=11 y=8 z=3 The length, width, and height of the original cuboid are 11 cm, 8 cm, and 3 cm, respectively. ）

Surface area = 2 xy + 2 xz + 2 yz = 290 square centimeters.

The length, width and height are A, B, and C

The length is reduced by 2 cm, the width and height are the same, and the volume is reduced by 48 cubic centimeters.

then there is b*c=48 2=24

The width is increased by 3 cm, the length and height are the same, and the volume is increased by 99 cubic centimeters.

then there is a*c=99 3=33

The height is increased by 4 cm, the length and width are the same, and its volume increases by 352 cubic decimeters (decimeters?). ）

Then there is a*b=352000 4=88000, which is obviously impossible.

If it is centimeters, it is a*b=352 4=88, and the original surface area = 2ab + 2ac + 2bc = 290).

Length is reduced by 2 cm, volume is reduced by width * height * 2 = 48, width * height = 24, in the same way, length * height = 33, length * width = 88, surface area (24 + 33 + 88) * 2 = 290 (square centimeters).

a*b*c=v；（a-2）*b*c=v-48;a*(b+3)*c=v+99;a*b*(c+4)=v+352 to find the length, width and height of abc (v is the volume).

Surface area s=2*(a*b+b*c+c*a).

The length, width and height are x y z

Then according to the formula of volume, three equations are listed separately to form a system of equations.

Solve x y z

The surface area is then calculated using the surface area formula.

48 2 = 24 (square centimeters).

99 3 = 33 (square centimeters).

352 4 = 88 (square centimeters).

24 + 33 + 88) 2 = 290 (square centimeters).

The greatest common factor of 24 and 33 is 3

The greatest common factor of 24 and 88 is 8

The greatest common factor of 33 and 88 is 11

You've got this math problem right! Distributive property by multiplication.

You read the wrong last step, 90500 + 1810 = 92310

You may see it as 90500+18100.

Xiao Ming's family used 24 tons of water in July, which belongs to the second level of water consumption, which is stipulated to be 18 tons to 25 tons (including 25 tons) per household per month

Yuan. His family should pay the water bill.

Xiaohong's family should pay 39 yuan for water in July, and her family's water consumption in July is x tons.

x = 27 tons.

Her family's water consumption in July was 27 tons.

1, 2, set the water consumption to x, ** to y.

xy＝39x＝39／y

Set the usual fee as a yuan, the number of applicants on the first day is n, then the second day is n+100 people from the first day: a(1+20%)*n=6000 1);

Divide (2) by (2) the next day: a(1+10%)*n+100)=8000 2)(1) and (2).

x=(6000+8000) [n+(n+100)]=700 27 There should be something wrong with your data.

1. Set up 1 large ship.

42-1 6=36 (person).

36 4 = 9 (strips).

Answer: 1 large boat rental and 9 small boat rentals.

2. Is there a mistake?

3. Everything is done right.

20 5 = 100 (points).

100-79 = 21 (min).

5+2=7 (min) ......If you make a mistake, you will be deducted points.

21 7 = 3 (Dao) ......The number of questions you got wrong.

20-3=17 (Dao) ......The number of questions to get right.

Answer: Do 17 things right.

4-3835=165 (yuan).

51 + 4 = 55 (yuan).

165 55 = 3 (only).

A: 3 were damaged.

Hehe, I hope it helps!!

The first question is 6x7=42, and if there are 42 people in the class, it is possible to rent all 7 large boats;

If the least common multiple of 4 and 6 is 12 = 4x3 = 6x2, it may be necessary for 12 people to rent 2 large boats and 3 small boats instead, so that 4x3 + 6x5 = 12 + 30 = 42, there are 12 people to rent 3 small boats, and the remaining 30 people to rent 5 large boats, which is a total of 8 boats;

If you want 12 people to rent a small boat less, that is, 4x6 + 6x3 = 24 + 18 = 42, there will be 24 people to rent 6 small boats, and the remaining 18 people to rent 3 large boats, a total of 9 boats;

You can also 4x9 +6x1 =36+6 =42, there are 36 people who rent 9 small boats, and the remaining 6 people rent 1 large boat, a total of 10 boats.

Choose for yourself the four options.

The third question has 20 questions, if you get all the questions right, it is 5x20 = 100 points, but in the end you only get 79 points, 100-79 = 21, a total of 21 points less.

If you do a question wrong, you will not only get 5 points less, but also deduct 2 points, you will get 7 points less, 21 7 = 3, which is to do 3 questions incorrectly, 20-3 = 17, and only do 17 questions correctly.

Check and see, 5x17 = 85, 20-17 = 3, 3x2 = 6, 85-6 = 79

That's right, it was 17 questions that got it right, got 85 points, and the remaining 3 questions got it wrong, so 6 points were deducted, leaving 79 points.

The fourth question is 1000 vases, and you will get 4000 yuan for shipping, but you will only get 3835 yuan for freight, 4000-3835=165, 165 yuan less.

The compensation for the damage of a vase is 51 yuan, and the shipping fee is less than 4 yuan, then 51 + 4 = 55,165 55 = 3, which is the damage to 3 vases.

Check it out, 51x3 + 4x3 = 153 + 12 = 165, that's right, damage 3 vases, a total reduction of 165 yuan.

1.If there is 1 large boat, 9 small boats; If there are 3 large boats, 6 small boats; If there are 5 large boats, 3 small boats; If there are 7 large boats, there are 0 small boats.

Solution 3: If you do the correct x question, you will do the wrong (20-x) question.

According to the title, 5x-2(20-x)=79

The solution is x=17

Answer: Get 17 questions right.

4 Solution: If x vases are damaged, then there are no broken vases (1000-x).

According to the title, 4(1000-x)-51x=3835 is solved x=3

A: 3 vases were damaged.

Question 1: Draw a table.

Question 2 is incorrect. Assuming that 100 people are all students, and the ticket costs 3,000 yuan, how can it be 818 yuan?

Question 3: Suppose you get all 20 questions right, 20 5=100 (points), 100-79) (5+2)=3 (questions) Do the wrong questions.

20-3=17 (questions) Do the right questions.

Question 4: 1000 4=4000 (yuan).

4000-3835) (51+4)=3 (pcs) Damaged vase.

1 5 large boats and 3 small boats.

2 How can the number of money be 818?

3 20*5=100 points 100-79=21 points 2+5=7 21 7=3

So get 20-3=17 questions right.

4 1000 * 4 = 4000 yuan 4000-3825 = 165 yuan There are 3 51 in 165 So the rest of the money is exactly 12 yuan, which is the freight of 3 vases, so 3 vases are damaged.

1.There are x large boats and y small boats.

6x+4y=42

x=1 y=9 6*1+4*9=42x=3 y=6 6*3+4*6=42x=4 y=4 4*6+4*4=42x=5 y=3 5*6+4*3=42x=7 y=0 6*7+0*4=42 ）

1.Big ship x, small boat y 6x+4y=42 if x=0, y=11 ;

x=1，y=9 ;

x=2,y=8 ;

x=3,y=6 ;

x=4,y=5

x=5,y=3 ;

x=6, y=2

x=7 ,y=0 rented, not necessarily full 2Teacher x people, student y people.

x+y=100 60x+30y=818, can you type the complete question? It feels wrong.

3.Do the x lane right 5x-2(20-x)=797x=119

x=174.Damaged x vases.

1000-x)*4-51x=3835

165=55xx=3

1.Assuming that they are all small boats, 42 divided by 4 is equal to 10 more than 2, and the difference between 2 and the number of people who can sit on each large boat minus the difference between the number of people who can sit in the small boat, that is, 2 divided by (6-4) is equal to 1, it is a big boat, and the number of small boats obtained by subtracting 1 from 10 is 9 2There is a problem with the question of your second question, if the ticket prices are all dozens, then the number of digits of the total ticket price is 0 3

Let the correct one be named x, and the wrong one be named y x+y=20 5x-2y=79 x=17 y=3

4.Let x be damaged, 4*(1000-x)-51x=3835, the meaning of the equation is that the freight earned without damage minus the money lost for damage is equal to the final freight. x=3

1 5 large boats and 3 small boats.

3 20*5=100 points 100-79=21 points 2+5=7 21 7=3

4 1000 * 4 = 4000 yuan 4000-3825 = 165 yuan damaged 3 vases.

1 The answer is to rent 3 large boats and 6 small boats.