-21-8a=-5a+30

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Solution for -21-8a=-5a+30 equation: 



-21-8a=-5a+30

We move all terms to the left:

-21-8a-(-5a+30)=0

We get rid of parentheses

-8a+5a-30-21=0

We add all the numbers together, and all the variables

-3a-51=0

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

-3a=51

a=51/-3

a=-17

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