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n*3+5*10=320
We move all terms to the left:
n*3+5*10-(320)=0
determiningTheFunctionDomain n*3-320+5*10=0
We add all the numbers together, and all the variables
n*3-270=0
Wy multiply elements
3n-270=0
We move all terms containing n to the left, all other terms to the right
3n=270
n=270/3
n=90
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