9+2x=129

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Solution for 9+2x=129 equation: 



9+2x=129

We move all terms to the left:

9+2x-(129)=0

We add all the numbers together, and all the variables

2x-120=0

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

2x=120

x=120/2

x=60

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