bjr
3(3x + 1) - 31 = 26 - 2(x + 5)
9x + 3 - 31 = 26 - 2x - 10
9x + 2x = 26 - 10 - 3 + 31
11x = 16 - 3 + 31
11x = 44
x = 44/11
x = 4
la solution est bien 4
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bjr
3(3x + 1) - 31 = 26 - 2(x + 5)
9x + 3 - 31 = 26 - 2x - 10
9x + 2x = 26 - 10 - 3 + 31
11x = 16 - 3 + 31
11x = 44
x = 44/11
x = 4
la solution est bien 4