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11 November, 23:54

5a + 3b + c = 40

a-3b+2c = - 10

14a-2b+3c = 50

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Answers (1)
  1. 12 November, 00:45
    0
    a = 40-3b-c/5

    a=-10+3b-2c

    a=50+2b-3c/14

    Step-by-step explanation:

    5a+3b+c - (3b+c) = 40 - (3b+c)

    5a=40-3b-c

    5a/5=40/5-3b/5-c/5

    a = 40-3b-c/5

    a-3b+2c - (3b+2c) = -10 - (-3b+2c)

    a=-10+3b-2c

    14a-2b+3c - (-2b+3c) = 50 - (-2b+3c)

    14a=50+2b-3c

    14a/14=50/14+2b/14-3c/14

    a=50+2b-3c/14
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