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-21(6+2y/7)+6y=-18
We move all terms to the left:
-21(6+2y/7)+6y-(-18)=0
We add all the numbers together, and all the variables
-21(2y/7+6)+6y-(-18)=0
We add all the numbers together, and all the variables
6y-21(2y/7+6)+18=0
We multiply parentheses
6y-42y-126+18=0
We add all the numbers together, and all the variables
-36y-108=0
We move all terms containing y to the left, all other terms to the right
-36y=108
y=108/-36
y=-3
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