Sagot :
6x + 8 - 5 + 10x = 14x - 21 + 12
6x + 10x - 14x = - 21 + 12 - 8 + 5
2x = -12
x = - 6
voilà ;D
Aidez moi svp 2(3x + 4) - 5 (1-2x) = 7 (2x - 3) + 12 Merci :)
6x + 8 - 5 + 10x = 14x - 21 + 12
6x + 10x - 14x = - 21 + 12 - 8 + 5
2x = -12
x = - 6
voilà ;D