Question

2.(3-y)+7. (2-y)=15-4y

Answer 1

2.(3 - y) + 7.(2 - y) = 15 - 4y

Aplica a distributiva:

2.3 - 2.y + 7.2 - 7.y = 15 - 4y

6 - 2y + 14 - 7y = 15 - 4y

-2y -7y + 4y = 15 - 6 - 14

-9y + 4y = -5

-5y = -5

y = -5/-5

y = 1