x+2x+80=500

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Solution for x+2x+80=500 equation: 



x+2x+80=500

We move all terms to the left:

x+2x+80-(500)=0

We add all the numbers together, and all the variables

3x-420=0

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

3x=420

x=420/3

x=140

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