20+a=-7(5-8a)

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Solution for 20+a=-7(5-8a) equation: 



20+a=-7(5-8a)

We move all terms to the left:

20+a-(-7(5-8a))=0

We add all the numbers together, and all the variables

a-(-7(-8a+5))+20=0



We calculate terms in parentheses: -(-7(-8a+5)), so:

-7(-8a+5)

We multiply parentheses

56a-35

Back to the equation:

-(56a-35)



We get rid of parentheses

a-56a+35+20=0

We add all the numbers together, and all the variables

-55a+55=0

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

-55a=-55

a=-55/-55

a=1

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