-9=-2y+1

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Solution for -9=-2y+1 equation: 



-9=-2y+1

We move all terms to the left:

-9-(-2y+1)=0

We get rid of parentheses

2y-1-9=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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