6y-20+21y+20=12y+30

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Solution for 6y-20+21y+20=12y+30 equation: 



6y-20+21y+20=12y+30

We move all terms to the left:

6y-20+21y+20-(12y+30)=0

We add all the numbers together, and all the variables

27y-(12y+30)=0

We get rid of parentheses

27y-12y-30=0

We add all the numbers together, and all the variables

15y-30=0

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

15y=30

y=30/15

y=2

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