12x-3+x=21x-4

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



12x-3+x=21x-4

We move all terms to the left:

12x-3+x-(21x-4)=0

We add all the numbers together, and all the variables

13x-(21x-4)-3=0

We get rid of parentheses

13x-21x+4-3=0

We add all the numbers together, and all the variables

-8x+1=0

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

-8x=-1

x=-1/-8

x=1/8

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