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5(2n+4)-30=100
We simplify the equation to the form, which is simple to understand
5(2n+4)-30=100
Reorder the terms in parentheses
+(+10n+20)-30=100
Remove unnecessary parentheses
+10n+20-30=+100
We move all terms containing n to the left and all other terms to the right.
+10n=+100-20+30
We simplify left and right side of the equation.
+10n=+110
We divide both sides of the equation by 10 to get n.
n=11
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