20=4(6+a)

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Solution for 20=4(6+a) equation: 



20=4(6+a)

We move all terms to the left:

20-(4(6+a))=0

We add all the numbers together, and all the variables

-(4(a+6))+20=0



We calculate terms in parentheses: -(4(a+6)), so:

4(a+6)

We multiply parentheses

4a+24

Back to the equation:

-(4a+24)



We get rid of parentheses

-4a-24+20=0

We add all the numbers together, and all the variables

-4a-4=0

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

-4a=4

a=4/-4

a=-1

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