Question

Son dos ecuaciones:
Ayudenme plis..

Answer 1

4n+2(1-n) = 7-3(2-n)
4n+2-2n = 7-6+3n
2n +2 = 1+3n
2-1 = 3n-2n 
    1 = n

7y-2(4-y)=-2y+7(y+4)
7y-8+2y=-2y+7y+28
9y-8-=5y+28
9y-5y=28+8
4y=36
  y=9

Suerte.