7x-x1=4-7x+21

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Solution for 7x-x1=4-7x+21 equation: 



7x-x1=4-7x+21

We move all terms to the left:

7x-x1-(4-7x+21)=0

We add all the numbers together, and all the variables

7x-x1-(-7x+25)=0

We add all the numbers together, and all the variables

6x-(-7x+25)=0

We get rid of parentheses

6x+7x-25=0

We add all the numbers together, and all the variables

13x-25=0

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

13x=25

x=25/13

x=1+12/13

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