(2x+1)/(x-1) = 1
2x+1 = 1fois(x-1)
2x+1 = x-1
2x-x = (-1) +(-1)
x = -2
(2x-3)/(x+1) = 5/3
3fois(2x-3) = 5fois(x+1)
3fois2x-3fois3 = 5foisx+5fois1
6x-9 = 5x +5
6x - 5x = 5 +9
x = 14
8/x = 4/5
8fois5 = 4foisx
40 = 4x
x= 40/4
x =10
3/x = 12
x = 3/12
x = 1/4
x = 0,25
voila j espere que tu comprendras
