90=-10n+20

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Solution for 90=-10n+20 equation:



90=-10n+20
We move all terms to the left:
90-(-10n+20)=0
We get rid of parentheses
10n-20+90=0
We add all the numbers together, and all the variables
10n+70=0
We move all terms containing n to the left, all other terms to the right
10n=-70
n=-70/10
n=-7

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