Salut,
exo 1 :
-3/16 = x/4
-3*(4) = 16x
x = -12/16
x = -3/4
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17x - 7 = -9 + 14x
3x = -2
x = -2/3
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(x - 5)/5 - (x - 2)/3 = 3x/10
(6x - 30)/30 - (10x - 20)/30 = 9x/30
6x - 30 - 10x + 20 = 9x
-13x = 10
x = -10/13
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A +
