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31 October, 10:38

Solving systems of equations using substitution p=q+3 4p+3q = - 30

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  1. 31 October, 12:40
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    4 (q+3) + 3q = - 30

    4q + 12 + 3q = - 30

    7q+12 = - 30

    7q = - 12-30

    7q = - 42

    q = - 6

    p = - 3
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