9+7x=4x-72

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



9+7x=4x-72

We move all terms to the left:

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

We get rid of parentheses

7x-4x+72+9=0

We add all the numbers together, and all the variables

3x+81=0

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

3x=-81

x=-81/3

x=-27

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