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30+7y=-7+63y-187
We move all terms to the left:
30+7y-(-7+63y-187)=0
We add all the numbers together, and all the variables
7y-(63y-194)+30=0
We get rid of parentheses
7y-63y+194+30=0
We add all the numbers together, and all the variables
-56y+224=0
We move all terms containing y to the left, all other terms to the right
-56y=-224
y=-224/-56
y=+4
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