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15 October, 16:13

2x+8y=54

x+9y=67

Solve the system by subtitution

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Answers (1)
  1. 15 October, 16:23
    0
    Step-by-step explanation:

    2x + 8y = 54

    x + 9y = 67

    x = 67 - 9y

    2 (67-9y) + 8y = 54

    434 - 18y + 8y = 54

    434 - 10y = 54

    10y = 54 - 434

    10y = - 380

    y = - 38
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