21=6(y+8)-3y

Solution for 21=6(y+8)-3y equation:

21=6(y+8)-3y

We move all terms to the left:

21-(6(y+8)-3y)=0


We calculate terms in parentheses: -(6(y+8)-3y), so:

6(y+8)-3y

We add all the numbers together, and all the variables

-3y+6(y+8)

We multiply parentheses

-3y+6y+48

We add all the numbers together, and all the variables

3y+48

Back to the equation:

-(3y+48)


We get rid of parentheses

-3y-48+21=0

We add all the numbers together, and all the variables

-3y-27=0

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

-3y=27

y=27/-3

y=-9