X+(2x-9)+(2x-9)=72

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Solution for X+(2x-9)+(2x-9)=72 equation: 



X+(2X-9)+(2X-9)=72

We move all terms to the left:

X+(2X-9)+(2X-9)-(72)=0

We get rid of parentheses

X+2X+2X-9-9-72=0

We add all the numbers together, and all the variables

5X-90=0

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

5X=90

X=90/5

X=18

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