-2(a+10)+a=30

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Solution for -2(a+10)+a=30 equation: 



-2(a+10)+a=30

We move all terms to the left:

-2(a+10)+a-(30)=0

We add all the numbers together, and all the variables

a-2(a+10)-30=0

We multiply parentheses

a-2a-20-30=0

We add all the numbers together, and all the variables

-1a-50=0

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

-a=50

a=50/-1

a=-50

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