7-y=3(5-y)

Solution for 7-y=3(5-y) equation:

7-y=3(5-y)

We move all terms to the left:

7-y-(3(5-y))=0

We add all the numbers together, and all the variables

-y-(3(-1y+5))+7=0

We add all the numbers together, and all the variables

-1y-(3(-1y+5))+7=0


We calculate terms in parentheses: -(3(-1y+5)), so:

3(-1y+5)

We multiply parentheses

-3y+15

Back to the equation:

-(-3y+15)


We get rid of parentheses

-1y+3y-15+7=0

We add all the numbers together, and all the variables

2y-8=0

We move all terms containing y to the left, all other terms to the right

2y=8

y=8/2

y=4