7x-72=4x-9

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Solution for 7x-72=4x-9 equation: 



7x-72=4x-9

We move all terms to the left:

7x-72-(4x-9)=0

We get rid of parentheses

7x-4x+9-72=0

We add all the numbers together, and all the variables

3x-63=0

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

3x=63

x=63/3

x=21

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