-10=20-2y

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Solution for -10=20-2y equation: 



-10=20-2y

We move all terms to the left:

-10-(20-2y)=0

We add all the numbers together, and all the variables

-(-2y+20)-10=0

We get rid of parentheses

2y-20-10=0

We add all the numbers together, and all the variables

2y-30=0

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

2y=30

y=30/2

y=15

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