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19 September, 08:50

Solve the system of equations using elimination. 3p+9q=6 5p-5q=30

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Answers (2)
  1. 19 September, 09:25
    0
    45p-45q=270

    15p+45q=30

    Solving this will get 60p=300 so p=5

    Plug it in and we get 15+9q=6 so q=-1

    The answer is p=5 q=-1
  2. 19 September, 10:54
    0
    3p+9q=6

    5p-5q=30

    3 (5) + 9 (-1) = 6

    15-9=6✔

    5 (5) - 5 (-1) = 30

    25+5=30 ✔

    p=5

    q=-1
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