12x-8x=21

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Solution for 12x-8x=21 equation: 



12x-8x=21

We move all terms to the left:

12x-8x-(21)=0

We add all the numbers together, and all the variables

4x-21=0

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

4x=21

x=21/4

x=5+1/4

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