a pen and diary together cost $3.50 the diary cost $30.00 more than the pen how much does the pen cost (riddle)
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a pen and diary together cost $3.50 the diary cost $30.00 more than the pen how much does the pen cost (riddle)
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Answer:
Cost of pen + cost of pencil =$ 1.1 …….(1)
Cost of pen is $1 more than cost of pencil…
So, cost of pen - cost of pencil =$ 1 ……(2)
Add both equations
2 * ( cost of pen ) = $2.1
So cost of pen = $1.05
And cost of pencil = $0.05
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Explanation:
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