bonjour besoin d aide équations a résoudre 1) 6x-7=8 , 2) 8-7x=57 , 3) 6(x2)-4x+52=17 merci

Bonjour,

1) 6x - 7 = 8
6x = 8 + 7
6x = 15
x = 15/6
x = 5/2

2) 8 - 7x = 57
8 - 57 = 7x
-49 = 7x
x = -49/7
x = -7


3) 6 (x - 2) - 4x + 52 = 17
6x - 12 - 4x + 52 = 17
2x = 17 - 52 + 12
2x = -23
x = -23/2