3x+4x+5x=720

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Solution for 3x+4x+5x=720 equation: 



3x+4x+5x=720

We move all terms to the left:

3x+4x+5x-(720)=0

We add all the numbers together, and all the variables

12x-720=0

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

12x=720

x=720/12

x=60

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