Bonjour! Je vais essayer! : )
1) 2x + 12 = 5
2*x + 12 = 5
x = (5 - 12): 2
x = -7: 2
x = -3,5
2)5x - 15 = 33
5*x - 15 = 33
x = (33 + 15)/5
x = 48/5
x = 9,6
3)8x - 7 = 12
8*x - 7 = 12
x = (12 + 7)/8
x = 19/8 = 2,375
4)-5x + 7 = -17
-5*x + 7 = -17
x = (-17 - 7)/-5
x = -24/-5 = 4,8
5)-8x + 8 = -8
-8*x + 8 = -8
x = (-8 - 8)/-8
x = -16/-8 = 2
6)-8x - 8 = -8
-8*x - 8 = -8
x = (-8+8)/-8
x = 0/-8
x = 0
7)-23x + 32 = 68
-23*x + 32 = 68
x = (68-32)/-23
x = 36/-23
x = -1,6
8)24x + 32 = 33
24*x+32 = 33
x = (33-32)/24
x = 1/24
x est environ egale a 0,04167
9)17x - 10 = -20
17*x - 10 = -20
x = (-20+10)/17
x = -10/17
x est environ egale a -0,59
J'espere avoir aide! : )
