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18=3.y
We move all terms to the left:
18-(3.y)=0
We add all the numbers together, and all the variables
-(+3.y)+18=0
We get rid of parentheses
-3.y+18=0
We add all the numbers together, and all the variables
-3y+18=0
We move all terms containing y to the left, all other terms to the right
-3y=-18
y=-18/-3
y=+6
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