-4=2(a-9)-a

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Solution for -4=2(a-9)-a equation: 



-4=2(a-9)-a

We move all terms to the left:

-4-(2(a-9)-a)=0



We calculate terms in parentheses: -(2(a-9)-a), so:

2(a-9)-a

We add all the numbers together, and all the variables

-1a+2(a-9)

We multiply parentheses

-1a+2a-18

We add all the numbers together, and all the variables

a-18

Back to the equation:

-(a-18)



We get rid of parentheses

-a+18-4=0

We add all the numbers together, and all the variables

-1a+14=0

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

-a=-14

a=-14/-1

a=+14

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