Question

. Решите уравнение:

 

                   2(y + 3) = 21 – 3y.

Answer 1

2y+6=21-3y
5y=15
y=3
Ответ: 3

Answer 2

2(y+3)=21-3y
2y+6=21-3y
2y+3y=21-6
5y=15
y=3