Réponses

2014-10-16T23:04:43+02:00
7(2x + 5) + 3(x - 8) = 3(2x + 33)

14x +35 +3x - 24 = 6x + 99

14x +3x - 6x = 99 +24 - 35 = 88 

11x = 88    x = 88/11

S= {88/11}
2014-10-16T23:07:45+02:00
7 * 2x + 5 + 3 * x-8 = 3 * 2x+33
17 x + 5 -8 = 6x + 33
11x + 5 - 8 = 33
11x - 3 = 33
11x = 30
x = 30/11 = 2.72