40+20x=120

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Solution for 40+20x=120 equation: 



40+20x=120

We move all terms to the left:

40+20x-(120)=0

We add all the numbers together, and all the variables

20x-80=0

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

20x=80

x=80/20

x=4

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