bonjour
49.92 + 0.0 779 x = 19.56 + 0. 095 x
0. 0 779 x - 0 .095 x = 19.56 - 49.92
0.0171 x = - 30.36
x = - 303600 / 171
x = - 101 200 / 57
12.56 + 0.0125 x > 19.56 + 0.075 x
0. 0125 x - 0.075 x > 19.56 - 12.56
- 0.0625 x > 7
x < - 112
] - ∞ ; - 112 [
