3x-5x+12=21

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Solution for 3x-5x+12=21 equation: 



3x-5x+12=21

We move all terms to the left:

3x-5x+12-(21)=0

We add all the numbers together, and all the variables

-2x-9=0

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

-2x=9

x=9/-2

x=-4+1/2

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