3x-120=720

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Solution for 3x-120=720 equation: 



3x-120=720

We move all terms to the left:

3x-120-(720)=0

We add all the numbers together, and all the variables

3x-840=0

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

3x=840

x=840/3

x=280

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