-8x+9=21

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Solution for -8x+9=21 equation: 



-8x+9=21

We move all terms to the left:

-8x+9-(21)=0

We add all the numbers together, and all the variables

-8x-12=0

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

-8x=12

x=12/-8

x=-1+1/2

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