9a+9a-15-15=18a-30

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Solution for 9a+9a-15-15=18a-30 equation: 



9a+9a-15-15=18a-30

We move all terms to the left:

9a+9a-15-15-(18a-30)=0

We add all the numbers together, and all the variables

18a-(18a-30)-30=0

We get rid of parentheses

18a-18a+30-30=0

We add all the numbers together, and all the variables

=0

a=0/1

a=0

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