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One day a store sold 45 pens, the zippedy do's at $8.50 & The Royal Blues at $9.75. In all, $398.75 was spent on the pens. How many Royal Blues were sold that day?
15 years ago

Answers

bobpursley
45=Z+R
9.75R+8.5Z=398.75

R=45-Z
put that in for R in the second equation, and solve.
15 years ago

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