30x+120=720

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Solution for 30x+120=720 equation: 



30x+120=720

We move all terms to the left:

30x+120-(720)=0

We add all the numbers together, and all the variables

30x-600=0

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

30x=600

x=600/30

x=20

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