re re re
5 x - 8 = x + 3
5 x - x = 3 + 8
4 x = 11
x = 11 /4
5 x - 8 = 55 /4 - 32/4 = 23 / 4
x + 3 = 11/4 + 3 = 11/4 + 12 /4 = 23 /4
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Un parallélogramme a ses côtés opposés de même longueur donc5x - 8 doit être égal à x + 3
5x - 8 = x + 3
5x - x = 3 + 8
4x = 11
x = 11/4
re re re
5 x - 8 = x + 3
5 x - x = 3 + 8
4 x = 11
x = 11 /4
5 x - 8 = 55 /4 - 32/4 = 23 / 4
x + 3 = 11/4 + 3 = 11/4 + 12 /4 = 23 /4