Sagot :
bonsoir
[tex]5 x - 2 = - 7\\5 x = - 7 + 2 \\5 x = - 5 \\x = - 1\\\\3 x + 2 = x + 6 \\3 x - x = 6 - 2 \\2 x = 4\\x = 2 \\\\- 8 x + 3 = 5 x - 2 \\- 8 x - 5 x = - 2 - 3 \\- 13 x = - 5 \\x = 5/13 \\\\\\3 x + 5 = 7 - 2 x \\3 x + 2 x = 7 - 5 \\5 x = 5 \\x = 1 \\\\[/tex]
Réponse:
a) 5x = -7+2
5x = -5
x = -5/5
x = -1
b) 3x -x = 6-2
2x = 4
x = 4/2
x = 2
c) -8x -5x = -2-3
-13x = -5
x = -5/-13
x = 5/13
d) 3x + 2x = 7-5
5x = 2
x = 2/5