3x-x=144

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Solution for 3x-x=144 equation: 



3x-x=144

We move all terms to the left:

3x-x-(144)=0

We add all the numbers together, and all the variables

2x-144=0

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

2x=144

x=144/2

x=72

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