-3=-3(10-3a)

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



-3=-3(10-3a)

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(-3(-3a+10))-3=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+30-3=0

We add all the numbers together, and all the variables

-9a+27=0

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

-9a=-27

a=-27/-9

a=+3

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