7x-21=24-2x

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Solution for 7x-21=24-2x equation: 



7x-21=24-2x

We move all terms to the left:

7x-21-(24-2x)=0

We add all the numbers together, and all the variables

7x-(-2x+24)-21=0

We get rid of parentheses

7x+2x-24-21=0

We add all the numbers together, and all the variables

9x-45=0

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

9x=45

x=45/9

x=5

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