7x-23=8x-21

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Solution for 7x-23=8x-21 equation: 



7x-23=8x-21

We move all terms to the left:

7x-23-(8x-21)=0

We get rid of parentheses

7x-8x+21-23=0

We add all the numbers together, and all the variables

-1x-2=0

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

-x=2

x=2/-1

x=-2

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