48 minus 5 / 4 x = 13 to solve the equation

48 minus 5 / 4 x = 13 to solve the equation

transposition
4X = 48-13
5 / 4 x = 35
X = 35 △ 5 / 4
X=28

1, solve the equation 40% * 25-3.5x = 1

40%*25-3.5x=1
10-3.5x=1
3.5x=9
x=90/35
x=18/7

The solution equation: X-1 / x + 5x / X-1 = 6

Multiply x (x-1) on both sides to get:
（x-1）²+5x²=6x（x-1）
x²-2x+1+5x²-6x²+6x=0
4x+1=0
X = - 1 / 4
After testing, x = - 1 / 4 is the root of the original equation

Solving equation (1) 12 (1-x / 3) = 5x (2) - 6 (x / 2-1 / 3) - x = 1
(1)12(1-x/3)=5x (2)-6(x/2-1/3)-x=1

12(1-x/3)=5x
12-4x=5x
5x+4x=12
9x=12
x=4/3
-6(x/2-1/3)-x=1
-3x+2-x=1
3x+x=2-1
4x=1
x=1/4