30=20-8a+3a-10

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Solution for 30=20-8a+3a-10 equation: 



30=20-8a+3a-10

We move all terms to the left:

30-(20-8a+3a-10)=0

We add all the numbers together, and all the variables

-(-5a+10)+30=0

We get rid of parentheses

5a-10+30=0

We add all the numbers together, and all the variables

5a+20=0

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

5a=-20

a=-20/5

a=-4

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