7y+12-5y=42y

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Solution for 7y+12-5y=42y equation: 



7y+12-5y=42y

We move all terms to the left:

7y+12-5y-(42y)=0

We add all the numbers together, and all the variables

-40y+12=0

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

-40y=-12

y=-12/-40

y=3/10

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