12x-3=4x=21

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Solution for 12x-3=4x=21 equation: 



12x-3=4x=21

We move all terms to the left:

12x-3-(4x)=0

We add all the numbers together, and all the variables

8x-3=0

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

8x=3

x=3/8

x=3/8

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