100+30x=280

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Solution for 100+30x=280 equation: 



100+30x=280

We move all terms to the left:

100+30x-(280)=0

We add all the numbers together, and all the variables

30x-180=0

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

30x=180

x=180/30

x=6

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