20=15-(5a+2)

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Solution for 20=15-(5a+2) equation: 



20=15-(5a+2)

We move all terms to the left:

20-(15-(5a+2))=0



We calculate terms in parentheses: -(15-(5a+2)), so:

15-(5a+2)

determiningTheFunctionDomain
-(5a+2)+15

We get rid of parentheses

-5a-2+15

We add all the numbers together, and all the variables

-5a+13

Back to the equation:

-(-5a+13)



We get rid of parentheses

5a-13+20=0

We add all the numbers together, and all the variables

5a+7=0

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

5a=-7

a=-7/5

a=-1+2/5

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