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28 February, 21:19

If Liam arranges chairs in 9 rows of the same length he has 3 chairs left over if he arranges the chairs in 7 rows of that same length he has 19 left how many chairs does he have

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  1. 28 February, 22:11
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    75 chairs

    Step-by-step explanation:

    let x=number of chairs per row

    let y=total number of chairs

    use linear function:

    y=9x+3

    y=7x+19

    9x+3=7x+19

    9x-7x=19-3

    2x=16

    x=8

    plug 8 into either equation

    9*8+3=75

    7*8+19=75
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