Réponse :
Explications étape par étape
bonjour,
1) 3x+7=x-3
3x-x=-7-3
2x=-10
x=-10/2=-5
2) 2x+4-3x=11-7x
2x-3x+7x=-4+11
+6x=+7
x=7/6
3)-7x+1=x+17
-7x-x=-1+17
-8x=+16
x=-2
1)
3x + 7 = x - 3
3x - x = -3 -7
2x = -10
x = -10/2
x = -5
2)
2x + 4 - 3x = 11 -7x
2x - 3x + 7x = 11 - 4
6x = 7
x = 7/6
3)
-7x + 1 = x + 17
-7x - x = 17 - 1
-8x = 16
x = 16/-8
x = -2
