4y+21=13

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Solution for 4y+21=13 equation: 



4y+21=13

We move all terms to the left:

4y+21-(13)=0

We add all the numbers together, and all the variables

4y+8=0

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

4y=-8

y=-8/4

y=-2

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