4x-1=7x-21

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Solution for 4x-1=7x-21 equation: 



4x-1=7x-21

We move all terms to the left:

4x-1-(7x-21)=0

We get rid of parentheses

4x-7x+21-1=0

We add all the numbers together, and all the variables

-3x+20=0

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

-3x=-20

x=-20/-3

x=6+2/3

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