21+2y=31

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Solution for 21+2y=31 equation: 



21+2y=31

We move all terms to the left:

21+2y-(31)=0

We add all the numbers together, and all the variables

2y-10=0

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

2y=10

y=10/2

y=5

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