8x-28=x-21

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Solution for 8x-28=x-21 equation: 



8x-28=x-21

We move all terms to the left:

8x-28-(x-21)=0

We get rid of parentheses

8x-x+21-28=0

We add all the numbers together, and all the variables

7x-7=0

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

7x=7

x=7/7

x=1

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