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12 October, 16:10

How many solutions does the system have?

3x + y = 8

2 + 2y = 8

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Answers (1)
  1. 12 October, 19:19
    0
    x=2, y=2

    Step-by-step explanation:

    This question is a simultaneous equation

    So let's solve

    3x+y=8 ... (1)

    2x+2y=8 ... (2)

    Multiply (1) by 2

    6x+2y=16 ... (3)

    Substrate (2) From (3)

    4x=8

    Let's make x the subject of formula by dividing both sides by 4

    x=2

    So let's substitute the value of x into (1)

    3x+y=8

    3 (2) + y=8

    6+y=8

    y=8-6

    y=2

    Therefore x is 2, y is 2
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