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7y+12=57+40
We move all terms to the left:
7y+12-(57+40)=0
We add all the numbers together, and all the variables
7y+12-97=0
We add all the numbers together, and all the variables
7y-85=0
We move all terms containing y to the left, all other terms to the right
7y=85
y=85/7
y=12+1/7
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