Bonjour,
8(4x+6)=-4+3 x
32x +48 = -4 +3x
32x-3x = -4 -48
29x = -52
x = -52/29
b. 7(2 x-6)=10x+5
14x -42 = 10x +5
14x-10x = 5 +42
4x = 47
x= 47/4
Réponse :
*8(4x + 6) = - 4 + 3x
32x + 48 + 4 - 3x = 0
29x = -52
x = - 52/29
*7(2x - 6) = 10x + 5
14x - 42 - 10x - 5 = 0
4x = 47
x = 47/4
Explications étape par étape