3x-x=91

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Solution for 3x-x=91 equation: 



3x-x=91

We move all terms to the left:

3x-x-(91)=0

We add all the numbers together, and all the variables

2x-91=0

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

2x=91

x=91/2

x=45+1/2

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