x-4x-21=20

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Solution for x-4x-21=20 equation: 



x-4x-21=20

We move all terms to the left:

x-4x-21-(20)=0

We add all the numbers together, and all the variables

-3x-41=0

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

-3x=41

x=41/-3

x=-13+2/3

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