30+3a=-7a

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Solution for 30+3a=-7a equation: 



30+3a=-7a

We move all terms to the left:

30+3a-(-7a)=0

We get rid of parentheses

3a+7a+30=0

We add all the numbers together, and all the variables

10a+30=0

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

10a=-30

a=-30/10

a=-3

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