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7 August, 07:46

Item C sold for 5$ and item D sold for 7 you sold a combined total of 60 of item c and D and you made 400$ how many of each item did you sell

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  1. 7 August, 08:29
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    50 of D and 10 of C

    Step-by-step explanation:

    First of all, put this data into 2 equations.

    You sold 60 items, so C+D=60

    C is $5 so we can represent it by 5C

    D is $7 so we can represent it by 7D

    You made $400 total from C and D, so 5C+7D=400

    We can use simultaneous equations to solve this.

    To eliminate one of these variables, we'll multiply the first one by 5 to make it 5C like the other.

    5 (C+D=60) (make sure you multiply both sides.)

    so 5C+5D=300

    5C+7D=400

    Now we solve it:

    5C-5C+7D-5D=400-300

    7D-5D=100

    2D=100

    D=50

    Now we can substitute this with one of the equations to find C

    C+50=60

    C=60-50

    C=10

    so, (10x5) + (50x7) = 400
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