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2 May, 17:58

Three solutions for 5x+7y=19

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  1. 2 May, 18:04
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    Just sub in ANY number for x and solve for y

    5x + 7y = 19 ... lets say x = 0

    5 (0) + 7y = 19

    7y = 19

    y = 19/7 ... so when x = 0, y = 19/7 ... (0,19/7)

    5x + 7y = 19 ... lets say x = 1

    5 (1) + 7y = 19

    5 + 7y = 19

    7y = 19 - 5

    7y = 14

    y = 14/7

    y = 2 ... so when x = 1, y = 2 ... (1,2)

    5x + 7y = 19 ... lets say x = 3

    5 (3) + 7y = 19

    15 + 7y = 19

    7y = 19 - 15

    7y = 4

    y = 4/7 ... so when x = 3, y = 4/7 ... (3,4/7)
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