Réponse :
bonjour
Explications étape par étape :
4x – 3 = 11
4x =11+3
4x=14
x=14/4
x=7/2
10+ 12y = 7y - 5
12y-7y = -5 -10
5y = -15
y=-15/5
y=-3
4t – 3 = - 10t + 4
4t+10t = 4+3
14t = 7
t =7/14
t=1/2
2(x-7)=3(-x+1)
2x-14 = -3x+3
2x+3x =3+14
5x = 17
x= 17/5
(x - 1)(x + 3) = (x + 5)(x-4)
x²+3x-3-3x = x²-4x+5x-20
x²-x²+3x -3x+4x-5x = -20 +3
-x = -17
x= 17
