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-8=4y-7y
We move all terms to the left:
-8-(4y-7y)=0
We add all the numbers together, and all the variables
-(-3y)-8=0
We get rid of parentheses
3y-8=0
We move all terms containing y to the left, all other terms to the right
3y=8
y=8/3
y=2+2/3
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