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7(3-y)/4=-y
We move all terms to the left:
7(3-y)/4-(-y)=0
We add all the numbers together, and all the variables
7(-1y+3)/4-(-1y)=0
We get rid of parentheses
7(-1y+3)/4+1y=0
We multiply all the terms by the denominator
7(-1y+3)+1y*4=0
We multiply parentheses
-7y+1y*4+21=0
Wy multiply elements
-7y+4y+21=0
We add all the numbers together, and all the variables
-3y+21=0
We move all terms containing y to the left, all other terms to the right
-3y=-21
y=-21/-3
y=+7
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