1/ A = (2x+3) x 4
2/ A = 2x x 4 + 3 x 4
3/ si A = 36 alors L = A : l
donc 36:4 = 9
2x+3 = 9
x=3
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1/ A = (2x+3) x 4
2/ A = 2x x 4 + 3 x 4
3/ si A = 36 alors L = A : l
donc 36:4 = 9
2x+3 = 9
x=3
Voila :
1) A = (2x+3) x 4
2) A = 2x x 4 + 3 x 4
3) A = 36 donc : L = A : l donc 36:4 = 9
2x+3 = 9x=3
Si tu as des questions n'hesites pas!.... :)