Sagot :

Réponse :

7x-5=5x-3

2x = 2

x = 1

4x+15=x-3

3x = -18

x = -6

8x+5=3x-3

5x = -8

x = -8/5

x = 1.6

-3x+7=6x-9

-9x = -16

x = 16/9

7x-5=5x-3
7x-5x=-3+5
2x=2
X=1