-50=-2(3+a)

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Solution for -50=-2(3+a) equation: 



-50=-2(3+a)

We move all terms to the left:

-50-(-2(3+a))=0

We add all the numbers together, and all the variables

-(-2(a+3))-50=0



We calculate terms in parentheses: -(-2(a+3)), so:

-2(a+3)

We multiply parentheses

-2a-6

Back to the equation:

-(-2a-6)



We get rid of parentheses

2a+6-50=0

We add all the numbers together, and all the variables

2a-44=0

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

2a=44

a=44/2

a=22

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