3x-7+x=9

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



3x-7+x=9

We move all terms to the left:

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

We add all the numbers together, and all the variables

4x-16=0

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

4x=16

x=16/4

x=4

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