Найди корень уравнения :5у+7(3-у)=3(5-2у)-6

Question

Найди корень уравнения :5у+7(3-у)=3(5-2у)-6

Answer 1

5y+7(3-y) = 3(5-2y) -6
5y+21-7y = 15-6y-6
-2y+21=-6y+9
4y=-12
y=-3

Answer 2

5у+21-7у=15-6у-6
5у-7у+6у=15-6-21
4у=-12
у=-3