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.05+.10(2n)=4.20
We simplify the equation to the form, which is simple to understand
.05+.10(2n)=4.20
Reorder the terms in parentheses
.05+( + 0.2n)=4.20
Remove unnecessary parentheses
+.05 + 0.2n=+4.20
We move all terms containing n to the left and all other terms to the right.
+ 0.2n=+4.2-0.05
We simplify left and right side of the equation.
+ 0.2n=+4.15
We divide both sides of the equation by 0.2 to get n.
n=20.75
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