-11x-9=21-13x

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Solution for -11x-9=21-13x equation: 



-11x-9=21-13x

We move all terms to the left:

-11x-9-(21-13x)=0

We add all the numbers together, and all the variables

-11x-(-13x+21)-9=0

We get rid of parentheses

-11x+13x-21-9=0

We add all the numbers together, and all the variables

2x-30=0

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

2x=30

x=30/2

x=15

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