-9x-2x+7=3x-21

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Solution for -9x-2x+7=3x-21 equation: 



-9x-2x+7=3x-21

We move all terms to the left:

-9x-2x+7-(3x-21)=0

We add all the numbers together, and all the variables

-11x-(3x-21)+7=0

We get rid of parentheses

-11x-3x+21+7=0

We add all the numbers together, and all the variables

-14x+28=0

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

-14x=-28

x=-28/-14

x=+2

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