Sagot :
Bonsoir,
2x + 7 = 6x - 8
2x + 7 - 2x = 6x - 2x - 8
7 = 4x - 8
7 + 8 = 4x + 8 - 8
15 = 4x
15/4 = (4x)/4
15/4 = x soit x = 15/4
Bonsoir,
2x + 7 = 6x - 8
2x + 7 - 2x = 6x - 2x - 8
7 = 4x - 8
7 + 8 = 4x + 8 - 8
15 = 4x
15/4 = (4x)/4
15/4 = x soit x = 15/4