3=100-2n

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Solution for 3=100-2n equation: 



3=100-2n

We move all terms to the left:

3-(100-2n)=0

We add all the numbers together, and all the variables

-(-2n+100)+3=0

We get rid of parentheses

2n-100+3=0

We add all the numbers together, and all the variables

2n-97=0

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

2n=97

n=97/2

n=48+1/2

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