9a-(6a-30)=75

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Solution for 9a-(6a-30)=75 equation: 



9a-(6a-30)=75

We move all terms to the left:

9a-(6a-30)-(75)=0

We get rid of parentheses

9a-6a+30-75=0

We add all the numbers together, and all the variables

3a-45=0

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

3a=45

a=45/3

a=15

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