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2(-21/4)-3y=-21
We move all terms to the left:
2(-21/4)-3y-(-21)=0
We add all the numbers together, and all the variables
-3y+21+2(-21/4)=0
We multiply parentheses
-3y+21-21/4*2=0
We multiply all the terms by the denominator
-3y*4*2-21+21*4*2=0
We add all the numbers together, and all the variables
-3y*4*2+147=0
Wy multiply elements
-24y*2+147=0
Wy multiply elements
-48y+147=0
We move all terms containing y to the left, all other terms to the right
-48y=-147
y=-147/-48
y=3+1/16
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