-9+10x=21

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Solution for -9+10x=21 equation: 



-9+10x=21

We move all terms to the left:

-9+10x-(21)=0

We add all the numbers together, and all the variables

10x-30=0

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

10x=30

x=30/10

x=3

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