x-4x-3x=21

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



x-4x-3x=21

We move all terms to the left:

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

We add all the numbers together, and all the variables

-6x-21=0

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

-6x=21

x=21/-6

x=-3+1/2

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