3(y+7)=(y+9)-y

Solution for 3(y+7)=(y+9)-y equation:

3(y+7)=(y+9)-y

We move all terms to the left:

3(y+7)-((y+9)-y)=0

We multiply parentheses

3y-((y+9)-y)+21=0


We calculate terms in parentheses: -((y+9)-y), so:

(y+9)-y

We add all the numbers together, and all the variables

-1y+(y+9)

We get rid of parentheses

-1y+y+9

We add all the numbers together, and all the variables

9

Back to the equation:

-(9)


We add all the numbers together, and all the variables

3y+12=0

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

3y=-12

y=-12/3

y=-4