Solution equation: (5x + 80) / (8x + 80) = 3 / 4

Solution equation: (5x + 80) / (8x + 80) = 3 / 4

（5x+80）/（8x+80）=3/4
4（5x+80)=3(8x+80)
20x+320=24x+240
24x-20x=320-240
4x=80
x=20

The solution equation is 2 / 5x-1 = x + 4 / 5

-9/5=3/5x x=-3

Solve equation 1.5x-4 (2.5 = 0.5x) = 0

The = in brackets is a plus sign
1.5x-4(2.5+0.5x)=0
1.5x-10-2x=0
1.5x-2x=10
-0.5x=10
x=-20

Solution equation 5x = 4 / 4

4/5x=1-4/5
4/5x=1/5
X = 1 / 5 divided by 4 / 5
x=1/4

To solve the equation 1) x △ 3 / 8 = 5 / 24 × 3 / 5 2) 1 / 25X + 1 / 4 = 125 3) 4 / 5x △ 3 = 1 / 8

1）X÷3/8=5/24×3/5
X=1/8 * 8/3
X=1/3
2）1/25X+1/4=125
1/25X=125-0.25
X=3118.75
3）4/5X÷3=1/8
X=3/8 * 5/4
X=15/32

(1 / x + 4 / 5x) * 4 + 6 * 4 / 5x = 1. Solve the equation

4x+16/5x+24/5x=1
4x+8x=1
x=1/12

Solving binary linear equations 5x + 2Y = 40 (1) 6.25x + 2.4y = 48.2 (2)

5x + 2Y = 40 (1) 6.25x + 2.4y = 48.2 (2) 625x + 240y = 4820125x + 48y = 964 (3) (1) X25, then, 125x + 50y = 1000 (4) (4) - (3), then, 2Y = 36, y = 18 are substituted into (1) 5x + 36 = 40, x = 4 / 5 = 0.8, so, x = 0.8, y = 18 of binary linear equations

(15^3y-25x^2y^2-5x^2)/(-5x^3)

(15x^3y-25x^2y^2-5x^2)/(-5x^3)
=-5y+5y^2/x +1/x

5x^2-25x^2y

Original formula = - 5x ^ 2 (5y-1)

How to solve the equation with X-2 / 5x - (2 / 5x + 10) = 30
Come on, in five minutes

x-2/5x-2/5x-10=30,1/5x=40,x=200.
Or x-0.4x-0.4x-10 = 30, 0.2x = 40, x = 200