20n-40=40

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Solution for 20n-40=40 equation: 



20n-40=40

We move all terms to the left:

20n-40-(40)=0

We add all the numbers together, and all the variables

20n-80=0

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

20n=80

n=80/20

n=4

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