Ask for help with a math application problem, and add 30 points for correct answers!!

Solution: Set the price of each piece to be reduced by x

20+5x)*(44-x)=1600

20+5x=0 or 44-x=0

x=-4 or x=6

and x>=0 so x=36

A: The price should be reduced by 36 yuan per piece.

MXMM122 Please be serious, it's so simple to answer incorrectly!!

Solution: Each piece should be reduced in price by X yuan.

20+5x)(44-x)=1600

20(44-x)+5x(44-x)=1600880-20x+220x-5xx=1600200x-5xx=720

200x=720+5xx

x=(720+5xx)/200

x=x=36 A: The price of each piece should be reduced by 36 yuan.

Solution: Each piece should be reduced in price by X yuan.

20+5x)(44-x)=1600

Solution x=36

A: The price should be reduced by 36 yuan per piece.

Set the price of each piece should be reduced by x

20+5x)*(44-x)=1600

x=36 or x=4

The price of each piece should be reduced by 4 yuan or 36 yuan.

Set the price of each piece should be reduced by x

20+5x)*(44-x)=1600

x=36,x=4

That's right. Step 36 or 4

There are 25 boys and 85 girls.

Solution: If there are x boys, then the girls are 60+x.

60+x=4x-15

3x=60+15

x=25,60+x=85

A: There are 25 boys and 85 girls.

I hope it can help you, and I wish you progress in your studies!

Solution: Set up x boys.

Equation: x+60=4x-15

Solution x=25

Girls: 25 + 60 = 85 people.

A: There are 25 boys and 85 girls.

Set: If there are x boys, then there are (x+60) girls.

x+60=4x-15

Solution x=25

x+60=85

A: There are 25 boys and 85 girls.

1. Set to x

80000（1+x）=95000

x=2, set to x

200（1-x）=180

x = 3, last year 48-8 = 40 tons.

Set the increase in production by x40(1+x)=48

x= is 2 percent.

4. Original price x current price: x (

The current price is multiple the original price.

5. Let the radius of the circle be r, increase, and be.

Area original: R2

Area now: (.)

The area has increased, doubling the original by 21%.

6, set to x18%x=50

x = 278kg of sesame seeds.

9, set to xx-23%x-27%x=1100

x=2200

10, d=2, then r=1

Flow side area: 12=

5 minutes = 300 seconds.

The flow of water per second is 8cm, 300 seconds = 2400cm

2400 = 2400 cubic centimeters = liters.

11, (1) The radius of the first curve is 36m

Answer: 36+

3) Run the straight for an equal distance.

400m race = one lap = 2 semicircles = distance difference of a full circle second radius: , circumference of the circle = 2 r =

The radius of the first pass: 36, the circumference of the circle = 72

The difference is so early.

4) 800m race = 2 laps = 2 full circles.

Eighth radius: , 2 circumferences =

Fifth radius: , 2 circumferences =

The difference ---so --- answer yourself in advance).

13. You have a problem with the topic.

Sugar and water: 250 to 3000 = 1 to 12

Water and sugar: 12 to 1

Sugar and syrup: 250 to 3250 = 1 to 13

Sugar water and sugar: 13 to 1

14, 4x long, 3x wide

Circumference 14x=28

x = 2 area = 4 x 3x = 12x 2 = 48

15, length 7x, width 5x, height 2x, 7x+5x+2x=14x=224

x = 16 long 112

Width 80 height 32