33=30-a

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Solution for 33=30-a equation: 



33=30-a

We move all terms to the left:

33-(30-a)=0

We add all the numbers together, and all the variables

-(-1a+30)+33=0

We get rid of parentheses

1a-30+33=0

We add all the numbers together, and all the variables

a+3=0

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

a=-3

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