-(2a+10)+21=-a+19

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Solution for -(2a+10)+21=-a+19 equation: 



-(2a+10)+21=-a+19

We move all terms to the left:

-(2a+10)+21-(-a+19)=0

We add all the numbers together, and all the variables

-(2a+10)-(-1a+19)+21=0

We get rid of parentheses

-2a+1a-10-19+21=0

We add all the numbers together, and all the variables

-1a-8=0

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

-a=8

a=8/-1

a=-8

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