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2*x + 5*(16-x) = 50

2x + 80 - 5x = 50

30 - 3x = 0

30 = 3x

x = 10

Ergo, 10 * 5

We don’t teach our pri school kids to use algebra to solve word problems, but of course, your method is elegant.

I gotta teach my son to use algebra next time!

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