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An old family recipe that makes 12 servings contains 2/3 cups of flour. If you have to make servings, how many cups of flour will you need?
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How many servings? Not included, so that is some variable quantity, c servings.
SERVINGS CUPS of FLOUR
12 2/3
c x
Here, you want to solve for how many cups of flour, x.
-----------Solve.