Urgent Primary 6 math equation problems are as follows: Fast forward if you can

Equation: Set the first half of the month x million yuan.

x*(1+20%)=360

x=360÷

x=300 (10,000 yuan) arithmetic:

300 (10,000 yuan).

Solution: The turnover in the first half of the month was X million yuan.

According to the title: x(1+20%)=360

x =300

A: The turnover in the first half of the month is 300 yuan.

Let's set the turnover for the first half of the month as x

x（1+20%）=360

x=300, so the turnover in the first half of the month is 3 million yuan.

Untie. Set: The turnover in the first half of the month was 10,000 yuan.

1+20%）x=360

x=300 arithmetic:

300 (10,000 yuan).

A: The turnover in the first half of the month is 300 yuan.

Solution: If the turnover in the first half of the month is X million yuan, it is derived from the title that the turnover of this month is 10,000 yuan. (An increase of 2 percent is an increase of 20.)

Equation: , solved x=300

A: The turnover in the first half of the month was 3 million yuan.

— Hope it helps.; -

Solution: The turnover in the first half of the month is $10,000.

1+20%)x=360

x=300A: The turnover in the first half of the month was 3 million yuan.

The turnover in the first half of the month is $00,000.

1+20%）x=360

x=300

The side length of the square is 2 decimeters, so the area of the cut plank is the area of the square, which is 2 * 2 2 square decimeters.

As can be seen from the title, the number of female participants is (42+28) (1+3 4)=70 (7 4)=40 (person).

1.Solution: The diagonal is the diameter of the plank, so the radius is 1, and the area is x+x times two-thirds = 5010 5 3x = 5010 x = 3006

2.Solution: Let the male participants have x people, x+(x+28) 3 4=42, and the solution is x=12 (people), 12+28=40

It's as simple as that).

Solution: Let this pile of cement be originally x tons.

According to the title, it can be obtained:

x-20）×5/9=20

x=562, you need to buy x box to solve the set.

According to the title, it can be obtained:

450+x)×8/9=640

x=270

1.The original pile of cement was set up x tons.

x-20=（5/9）x

x = 45 (tons).

2.Set up and buy x boxes of white chalk.

450+x=640*（8/9）

x=640*（8/9）-450

1.Let this pile of cement have x tons left, 5 9 * x = 20

Solution x=36

This pile of cement was originally 36 + 20 = 56 tons.

1.With x tons, then the equation is x-20 = 5/9x then 4/9 x = tons, so the cement was originally 45 tons.

2.If you buy x box again, then (450+x) 640 = 8 9Solve x is, but are you getting the number wrong in this question, and the calculation is not an integer

Basketball: 45*60%=27 (pcs).

Volleyball: 45-27=18 (pcs).

After selling a batch of basketballs, volleyball accounted for (1-25%) of the total, so now there are 18 (1-25%) = 24 (pcs) for basketball and volleyball

45-24=21 (pcs).

Pick me! I was right! o( o haha.

After selling, volleyball accounted for 75%, there were 18 volleyballs, and a total of 18 were left, and 21 were sold.

At the beginning there was one in basketball.

So there are 18 volleyballs.

In this question, the number of volleyballs should be grasped unchanged, 45*60%=27 (pieces) 45-27=18 (pieces), and there are 18 volleyballs. After selling, volleyball accounts for 1-25% = 75% of the current game, there are 18 volleyballs, 18 divided by 75% = 24 (pieces), the current total is 24, 45-24 = 21 (pieces), and 21 basketballs are sold.

1.Revert backwards.

60+180=240（kg)

240 divided by (1-5 9) = 540 (kg).

540-40=500（kg)

500 divided by (1-1 3) = 750 (kg) Answer: It turns out that this car of watermelons weighs 750 kilograms.

2.Let's say there are 2 boys and 3 girls.

138 times 2 = 276 (cm).

132 times (2+3) = 660 (cm).

660-276) divided by 3 = 128 (cm) Answer: The average height of girls is 128 cm.

Equation method:

Equation method: Let the original car of watermelons weigh x kilograms, then.

x(1-1 3)+40] (1-5 9)-180=60 gives x=750

The average height of girls is 128 cm.

÷（1-1/3）=750kg

Sorry, the second question will only solve the equation.

128 cm.

If the girl is A, then the boy is 2 3A, and the average height of the girl is B cm. Example equations.

138×2/3a+ab)=132×(2/3a+a)(92+b)a=220a

b=128

……It's so simple, think for yourself, what you come up with is your own thing.

Hehe, you should think about this question yourself.

1. Let the team take x meters to the head of the team and take t seconds, then there is a time to come back, I don't know if you have learned the binary system of equations).

2. No matter how you dilute it, the salt content does not change, 5 * 20% = 1 kg, that there is 4 kg of water. It is necessary to add x kg of water.

then there is 1 (4+x)=15%.

3. Let the original width of the rectangle be x meters, then 20x (original area) (5 7) = 20 (x-4) (current area) perimeter = 2 (20 + x).

4. Let A and B be x y respectively

There is x+y=55 (1-3 5)x=y-6

If I can solve the equation, I won't solve it.

2. Calculate how much salt there is first.

5*20%=1 kg.

1 15% = 20 3, 20 3-5 = 5 3 kg.

3. Let the original width be x

20x*5/7=20(x-4)

x = 14 circumference is equal to 2 (20 + 14) = 68

4. If A has x kg of grain, then B has 55-x

1-3/5)x=55-x-6

x=35 So A is 350,000 kilograms and B is 200,000 kilograms.