-5(a+4)=20

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



-5(a+4)=20

We move all terms to the left:

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

We multiply parentheses

-5a-20-20=0

We add all the numbers together, and all the variables

-5a-40=0

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

-5a=40

a=40/-5

a=-8

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