21=2y-7

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Solution for 21=2y-7 equation:



21=2y-7
We move all terms to the left:
21-(2y-7)=0
We get rid of parentheses
-2y+7+21=0
We add all the numbers together, and all the variables
-2y+28=0
We move all terms containing y to the left, all other terms to the right
-2y=-28
y=-28/-2
y=+14

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