20=5(a+3)

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



20=5(a+3)

We move all terms to the left:

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



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

5(a+3)

We multiply parentheses

5a+15

Back to the equation:

-(5a+15)



We get rid of parentheses

-5a-15+20=0

We add all the numbers together, and all the variables

-5a+5=0

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

-5a=-5

a=-5/-5

a=1

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