9x + 3 = 7x - 5 résoudre l'équation svp ✌

9x+3=7x-5
9x-7x=-5-3
2x=-8
x=-8/2=-4

9x + 3 = 7x-5
9x +3 - 7x = 7x -5 - 7x
2x +3 = -5
2x +3 -3 = -5 -3
2x = -8
2x / 2 = -8 / 2
x = -4