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12 March, 13:02

Gavin went on 25 runs last month that totaled 103 miles. Each run was a distance of either 3 miles or 5 miles. Which system of

equations can be used to determine the number of 3-mile runs, x, and the number of 5-mile runs, y, that Gavin went on last month?

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  1. 12 March, 16:22
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    3x+5y=105

    x+y=25

    Step-by-step explanation:

    x is the number of 3 mile runs so the total distance travelled is 3x miles. y is the number of 5 mile runs so the total distance travelled is 5y miles. Together Gavin travelled 103 miles so 3x+5y=105.

    The number of 3 mile and 5 mile runs he did in total were 25 so x+y=25.

    So the answer is:

    3x+5y=105

    x+y=25

    Done.
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