Question

20y-5.(1+y)=5.(4y-4)-40

Answer 1

.............................

Answer 2

20y-5*(1+y)=5*(4y-4)-40

20y-5-5y=20y-20-40   (20y dos dois lados pode cortar)

-5-5y=-60

-5y=-60+5

y=-55/-5

y=11