21=y/3+6

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Solution for 21=y/3+6 equation:



21=y/3+6
We move all terms to the left:
21-(y/3+6)=0
We get rid of parentheses
-y/3-6+21=0
We multiply all the terms by the denominator
-y-6*3+21*3=0
We add all the numbers together, and all the variables
-1y+45=0
We move all terms containing y to the left, all other terms to the right
-y=-45
y=-45/-1
y=+45

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