Salut
(-3y+5)+(2y-9)+5y = -3y+5+2y-9+5y = 4y-4
(7n²+12n-8)-(6-7n) = 7n²+12n-8-6+7n = 7n²+19n-14
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Salut
(-3y+5)+(2y-9)+5y = -3y+5+2y-9+5y = 4y-4
(7n²+12n-8)-(6-7n) = 7n²+12n-8-6+7n = 7n²+19n-14