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24 August, 10:17

4 spoons and 3 forks cost $15 4 spoons and 1 fork cost $13 how many do the forks cost?

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  1. 24 August, 10:56
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    Let's say that s=spoons and f=forks.

    According to this, we can say that:

    {4s+3f=15

    {4s+f=13

    This is a system.

    We can then use elimination to solve and isolate the variable:

    (4s-3f=15)

    - (4s+f=13)

    We can then subtract and conclude that:

    -4f=2

    -f=1/2

    f=-1/2
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