-20=-2(x+9)

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Solution for -20=-2(x+9) equation: 



-20=-2(x+9)

We move all terms to the left:

-20-(-2(x+9))=0



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

-2(x+9)

We multiply parentheses

-2x-18

Back to the equation:

-(-2x-18)



We get rid of parentheses

2x+18-20=0

We add all the numbers together, and all the variables

2x-2=0

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

2x=2

x=2/2

x=1

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