-5y+12+9=4y+42

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Solution for -5y+12+9=4y+42 equation: 



-5y+12+9=4y+42

We move all terms to the left:

-5y+12+9-(4y+42)=0

We add all the numbers together, and all the variables

-5y-(4y+42)+21=0

We get rid of parentheses

-5y-4y-42+21=0

We add all the numbers together, and all the variables

-9y-21=0

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

-9y=21

y=21/-9

y=-2+1/3

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