2y-21=4y+5

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Solution for 2y-21=4y+5 equation: 



2y-21=4y+5

We move all terms to the left:

2y-21-(4y+5)=0

We get rid of parentheses

2y-4y-5-21=0

We add all the numbers together, and all the variables

-2y-26=0

We move all terms containing y to the left, all other terms to the right

-2y=26

y=26/-2

y=-13

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