Math?

a △ b means (7-a)*(3+b). Find c if
3 △ 1=5 △ c Please help. Ms.Sue possible to answer??

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asked by Grace
  1. Just plug in the numbers.

    3△5 = (7-3)(3+5) = 32
    5△c = (7-5)(3+c) = 6+2c

    so,

    32 = 6+2c
    c = 13

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    posted by Steve
  2. Thank You

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    posted by Grace

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