30n+100=20n+140

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Solution for 30n+100=20n+140 equation: 



30n+100=20n+140

We move all terms to the left:

30n+100-(20n+140)=0

We get rid of parentheses

30n-20n-140+100=0

We add all the numbers together, and all the variables

10n-40=0

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

10n=40

n=40/10

n=4

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