x-4x-7=5x-x-21

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Solution for x-4x-7=5x-x-21 equation: 



x-4x-7=5x-x-21

We move all terms to the left:

x-4x-7-(5x-x-21)=0

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

-3x-(4x-21)-7=0

We get rid of parentheses

-3x-4x+21-7=0

We add all the numbers together, and all the variables

-7x+14=0

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

-7x=-14

x=-14/-7

x=+2

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