-220=-10(9+x)

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Solution for -220=-10(9+x) equation: 



-220=-10(9+x)

We move all terms to the left:

-220-(-10(9+x))=0

We add all the numbers together, and all the variables

-(-10(x+9))-220=0



We calculate terms in parentheses: -(-10(x+9)), so:

-10(x+9)

We multiply parentheses

-10x-90

Back to the equation:

-(-10x-90)



We get rid of parentheses

10x+90-220=0

We add all the numbers together, and all the variables

10x-130=0

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

10x=130

x=130/10

x=13

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