6=-2(7-a)

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Solution for 6=-2(7-a) equation: 



6=-2(7-a)

We move all terms to the left:

6-(-2(7-a))=0

We add all the numbers together, and all the variables

-(-2(-1a+7))+6=0



We calculate terms in parentheses: -(-2(-1a+7)), so:

-2(-1a+7)

We multiply parentheses

2a-14

Back to the equation:

-(2a-14)



We get rid of parentheses

-2a+14+6=0

We add all the numbers together, and all the variables

-2a+20=0

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

-2a=-20

a=-20/-2

a=+10

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