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3y-18=-4+15y-50
We move all terms to the left:
3y-18-(-4+15y-50)=0
We add all the numbers together, and all the variables
3y-(15y-54)-18=0
We get rid of parentheses
3y-15y+54-18=0
We add all the numbers together, and all the variables
-12y+36=0
We move all terms containing y to the left, all other terms to the right
-12y=-36
y=-36/-12
y=+3
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