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20+20(2)+20(3)+20(n)=10.000.000
We move all terms to the left:
20+20(2)+20(3)+20(n)-(10.000.000)=0
We add all the numbers together, and all the variables
20n+20+202+203-0=0
We add all the numbers together, and all the variables
20n+425=0
We move all terms containing n to the left, all other terms to the right
20n=-425
n=-425/20
n=-21+1/4
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