Salut,
on a donc l'équation (1) : (1 + x) ÷ (-5 - x) = 7/6
(1) <=> (1 + x) = 7/6 * (-5 - x)
(1) <=> 1 + x = -35/6 - 7/6x
(1) <=> x + 7/6x = -35/6 - 1
(1) <=> 13x/6 = -41/6
(1) <=> 13x = -41
(1) <=> x = -41/13
A+
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Salut,
on a donc l'équation (1) : (1 + x) ÷ (-5 - x) = 7/6
(1) <=> (1 + x) = 7/6 * (-5 - x)
(1) <=> 1 + x = -35/6 - 7/6x
(1) <=> x + 7/6x = -35/6 - 1
(1) <=> 13x/6 = -41/6
(1) <=> 13x = -41
(1) <=> x = -41/13
A+