bonjour
A = 90 * 0.8 * 10 ^0 sur 1.8 * 10 ^ 27
A = 72 / 1.8 * 10 ^27
A = 40 * 10 ^27
A = 4 * 10 ^ 28
B = 0.2 * 2 400 * 10 ^0 / 300 * 10 ^ - 10
B = 480 / 300 * 10 ^ - 10
B = 1.6 * 10 ^ - 10
- 7 x + 8 - 8 x - 8 = - 15 x
x + 10 + 4 x - 10 = 5 x
- 5 x - 5 - 3 x + 5 = - 8 x
7 x + 1 - 4 x + 4 = 3 x + 5
- 15 x + 5 x - 8 x + 3 x + 5 = - 15 x + 5
- 7 x + 8 + x + 10 - 5 x - 5 + 7 x - 1 = - 4 x + 14
- 8 x - 8 + 4 x - 10 - 3 x + 5 - 4 x + 4 = - 11 x - 9
- 4 x + 5 - 11 x - 9 = - 15 x + 5
