40+80x=280

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Solution for 40+80x=280 equation: 



40+80x=280

We move all terms to the left:

40+80x-(280)=0

We add all the numbers together, and all the variables

80x-240=0

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

80x=240

x=240/80

x=3

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