10a-(-(5a+20))=5(3a+4)

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Solution for 10a-(-(5a+20))=5(3a+4) equation: 



10a-(-(5a+20))=5(3a+4)

We move all terms to the left:

10a-(-(5a+20))-(5(3a+4))=0



We calculate terms in parentheses: -(-(5a+20)), so:

-(5a+20)

We get rid of parentheses

-5a-20

Back to the equation:

-(-5a-20)





We calculate terms in parentheses: -(5(3a+4)), so:

5(3a+4)

We multiply parentheses

15a+20

Back to the equation:

-(15a+20)



We get rid of parentheses

10a+5a-15a+20-20=0

We add all the numbers together, and all the variables

=0

a=0/1

a=0

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