2(-4+a)=-20

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Solution for 2(-4+a)=-20 equation: 



2(-4+a)=-20

We move all terms to the left:

2(-4+a)-(-20)=0

We add all the numbers together, and all the variables

2(a-4)-(-20)=0

We add all the numbers together, and all the variables

2(a-4)+20=0

We multiply parentheses

2a-8+20=0

We add all the numbers together, and all the variables

2a+12=0

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

2a=-12

a=-12/2

a=-6

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