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2+y=-7+3y
We move all terms to the left:
2+y-(-7+3y)=0
We add all the numbers together, and all the variables
y-(3y-7)+2=0
We get rid of parentheses
y-3y+7+2=0
We add all the numbers together, and all the variables
-2y+9=0
We move all terms containing y to the left, all other terms to the right
-2y=-9
y=-9/-2
y=4+1/2
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