7x+3+9-x=66

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Solution for 7x+3+9-x=66 equation: 



7x+3+9-x=66

We move all terms to the left:

7x+3+9-x-(66)=0

We add all the numbers together, and all the variables

6x-54=0

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

6x=54

x=54/6

x=9

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