-5x+12x=21

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



-5x+12x=21

We move all terms to the left:

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

We add all the numbers together, and all the variables

7x-21=0

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

7x=21

x=21/7

x=3

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