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5n=100-n*2=200
We move all terms to the left:
5n-(100-n*2)=0
We add all the numbers together, and all the variables
5n-(-n*2+100)=0
We get rid of parentheses
5n+n*2-100=0
Wy multiply elements
5n+2n-100=0
We add all the numbers together, and all the variables
7n-100=0
We move all terms containing n to the left, all other terms to the right
7n=100
n=100/7
n=14+2/7
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