-The solution of x-3 / 5 = 5x + 4 / 15 -5 x-3 = 15 x + 4, speed, thank you first It's still a process

-The solution of x-3 / 5 = 5x + 4 / 15 -5 x-3 = 15 x + 4, speed, thank you first It's still a process

-X-3 / 5 = 5x + 4 / 15
-5 X-15 5x = 4 + 3
-8x out of 15 = 7
X = 7 ÷ (- 8 / 15)
X= -105/8
X = 105 out of 8

7 / 8 △ x = 3 / 4 calculated by balance principle

7/8÷X=3/4
Multiply both sides by X, and 7 / 8 = 3x / 4
Multiply both sides by 8 to get 7 = 6x
Divide both sides by 6 at the same time to get 7 / 6 = x, that is, x = 7 / 6

Observe the following formula (1) (x + 2) (x + 3) = x square + 5x + 6 (2) (X-2) (x-3) = x square - 5x + 6 to express the law of discovery

The law of discovery can be expressed as follows:
(x+a)(x+b)=x²+(a+b)x+ab

Two real roots of x square + 5x-3 = 0

△=25+3*4=37
x1=(-5+√37)/2
x2=(-5-√37)/2