-30=30-a

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Solution for -30=30-a equation: 



-30=30-a

We move all terms to the left:

-30-(30-a)=0

We add all the numbers together, and all the variables

-(-1a+30)-30=0

We get rid of parentheses

1a-30-30=0

We add all the numbers together, and all the variables

a-60=0

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

a=60

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