4 equation questions!! Rush for equations and answers!

It's easy to get in according to the formula, ah.........

2 3 x/2+3x/2=7 4 3x+7=32-2x 5 3x+5(138-x)=540 6 3x-7(x-1)=3-2(x+3) 7 18x+3x-3=18-2(2x-1) 8 3(20-y)=6y-4(y-11) 9 -(x/4-1)=5 10 3[4(5y-1)-8]=6 2008/12/14

2(x-2)-3(4x-1)=9(1-x)2. 11x+64-2x=100-9x

3. 15-(8-5x)=7x+(4-3x)4. 3(x-7)-2[9-4(2-x)]=225. 3/2[2/3(1/4x-1)-2]-x=26. 2(x-2)+2=x+1

7.8. 30x-10(10-x)=100

9. 4(x+2)=5(x-2)

10. 120-4(x+5)=25

11. 15x+863-65x=54

12.13. 11x+64-2x=100-9x

16. 820-16x=

17. (x-6)×7=2x

18. 3x+x=18

22. x+

23.24. 1\ 50x+10=60

25. 2\ 60x-30=20

26. 3\ 3^20x+50=110

27. 4\ 2x=5x-3

28. 5\ 90=10+x

29. 6\ 90+20x=30

30. 7\ 691+3x=700

1]2—（1—y）=—2

2-1+y=--2

y=-2-2+1=-3

2）5—（x—1）=3—3x

5-x+1=3-3x

2x=3-1-5

2x=-3x=

3）3—2（2x+1）=2（x—3）

3-4x-2=2x-6

6x=3-2+6

6x=7x=7/6

Pin type roll 4) 4x-3 (20-x) = 6x - rent brother 7 (9-x) 4x-60 + 3x = 6x-63 + 7x

7x-60=13x-63

6x=3x=

5）12（2—3x）=4x+4

24-36x=4x+4

40x=20

x=400-30x=70+25x

55x=330

x=67）4x—3（20—x）+4=0

4x-60+3x+4=0

7x=60-4=56

x=88)deficit 1-3(8-x)=-2(15-2x)1-24+3x=-30+4x

x=1-24+30

x=79）2-(1-y)=-2

2-1+y=-2

1+y=-2

y=-310）5-（x-1)=3-3x

5-x+1=3-3x

6-x=3-3x

x+3x=3-6

x = web link.

3) Let b be the x beam and c be the y beam, then a is the 20-x-y beam.

From the question, it can be seen that 180 (20-x-y) + 60x + 120y = 1800 is simplified to 2x + y = 30

Because 20 y 0 and x+y 20

So 0 x 15 and x 10

10≤x≤15

So there are a total of 6 possibilities.

Profit depends on the subject.

Increase the purchase price of all three types of flowers to the same **.

a, 2 bundles 360 yuan, profit of 20 2 = 40

B, 6 bundles of Shen imitation 360 yuan, the profit is 10 6 = 60C, 3 bundles of 360 yuan, the profit of blind celery is 12 3 = 36 It can be seen that the same ** buy flowers, buy B has the highest profit.

So let's use the result set above.

That is, when x is the largest, our profit is the highest.

From this we know that x=15

Then y=0a is 20-15-0=5 bundles, b is 15 bundles, and c is 0 bundles.

If A has x people, then B has 3 7*x people.

3/7*x+30)/(x-30)=2/3

2(x-30)=3(3/7*x+30)

2x-60=9/7*x+90

2x-9/7*x=90+60

5/7*x=150x=210

A: There were 210 people in A and 90 people in B.

Set A and B to be x kilograms.

x-180)/(2x)=2/5

2*2x=5(x-180)

4x=5x-900

x=900 now.

A has: 900-180 = 720 kg.

B: 900 kg.

300 (people) total number of people.

300 3 10 = 90 (people) Team B.

300 7 10 = 210 (people) Team A.

2. Set X kg for A and B.

x-180)/(2x)=2/5

2*2x=5(x-180)

4x=5x-900

x=900 now.

A has: 900-180 = 720 kg.

B: 900 kg.

1 Solution: If team A has x people, then team B has 3 7x people.

x-30）/（3/7x+30）=3/2

x=210 3/7x=90

A: Team A originally had 210 people, and Team B had 90 people.

2 Solution: If the existing X kg of fruit A, then the existing (x + 180) kg of B fruit.

x=（x+x+180)*2/5

x=360 x+180=540

A: There are 360 kg of fruit A and 540 kg of fruit B.

Set: Family x people then B 7 points 3 people.

Equation 7 points 3x plus 30 is equal to 3 points 2 compared to x minus 30

2 methods almost want to put by oneself.

1) The length of the type is not set to be x meters and the width is y meters.

xy=20,x+2y=13,x, the solution is x=5, y=4;

2) Yes, the wall is 4 meters wide and the long side of the bridge is 5 meters;

2.Let the original interest rate be x, then there is [(10000x-5000)(x-3)-(10000x-5000)]* to solve x

3.Let the side length be x,y, then x+y=(56+120) 2; xy=1152;Solve to get y 2-88y+1152=0;(y-72)(y-16)=0.When y=72, x=16, and y=16, x=72.

4.The set price is reduced by x. then 5000*(1+; Get x=5

Since other production conditions have not changed, how many additional machines would be needed to produce 12,600 parts per day for every 4 additional parts? Is there a mistake??? I don't understand.

12600 300-40 = 42-40 = 2 units.

This kind of problem is still an equation. It takes x hours to reach location B under normal conditions.

Then the distance between the two = 40x = 40x3 + 30 (x + 45 minutes is the hour.)

If we get 10x=, then 40x=210 is the distance between the two.

Solution: Remember to check.

Remember to see if I copied the question correctly.

Is -1 on the right side of the equation for the second question?