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23 September, 09:58

3. Solve the system of equations using linear combination.

a + c = 9

8a + 4.5c = 58

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Answers (1)
  1. 23 September, 10:03
    0
    A+c=9 so a=9-c

    8 (9-c) = 72-8c+4.5c=58

    12.5c=58-72

    12.5c=-14

    c=-1.12
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