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.40n+.50n=500
We simplify the equation to the form, which is simple to understand
.40n+.50n=500
We move all terms containing n to the left and all other terms to the right.
+ 0.4n + 0.5n=+500
We simplify left and right side of the equation.
+ 0.9n=+500
We divide both sides of the equation by 0.9 to get n.
n=555.555555556
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