John spent $10.40 on 5 notebooks and 5 pens. Ariana spent $7.00 on 4 notebooks and 2 pens. What is t

Discussion in 'Calculator Requests' started by math_celebrity, Mar 5, 2017.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    John spent $10.40 on 5 notebooks and 5 pens. Ariana spent $7.00 on 4 notebooks and 2 pens. What is the ost of 1 notebook and what is the cost of 1 pen?

    Let the number of notebooks be n and the number of pens be p. We have two equations:
    1. 5n + 5p = 10.40
    2. 4n + 2p = 7
    Using our simultaneous equation calculator, we have:
    • n = 1.42
    • p = 0.66

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