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5x - ( 2x - 11) = 3(5-2x)-(2x+15)
5x - 2x + 11 = 15 - 6x - 2x - 15
3x + 11 = -8x8x + 3x = -11
11x = -11
x = -11/11
x = -1
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Bonsoir
5x - ( 2x - 11) = 3(5-2x)-(2x+15)
5x - 2x + 11 = 15 - 6x - 2x - 15
3x + 11 = -8x
8x + 3x = -11
11x = -11
x = -11/11
x = -1