9x-7+2x=21

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



9x-7+2x=21

We move all terms to the left:

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

We add all the numbers together, and all the variables

11x-28=0

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

11x=28

x=28/11

x=2+6/11

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