3y+7y=40

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Solution for 3y+7y=40 equation: 



3y+7y=40

We move all terms to the left:

3y+7y-(40)=0

We add all the numbers together, and all the variables

10y-40=0

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

10y=40

y=40/10

y=4

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