-75=-3(3a+10)

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Solution for -75=-3(3a+10) equation: 



-75=-3(3a+10)

We move all terms to the left:

-75-(-3(3a+10))=0



We calculate terms in parentheses: -(-3(3a+10)), so:

-3(3a+10)

We multiply parentheses

-9a-30

Back to the equation:

-(-9a-30)



We get rid of parentheses

9a+30-75=0

We add all the numbers together, and all the variables

9a-45=0

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

9a=45

a=45/9

a=5

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