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27 March, 13:56

Substitution:

2x+4=y

4y-18x=5

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Answers (1)
  1. 27 March, 14:05
    0
    (7/8,23/4) or (0.875,5.75)

    x=7/8 or 0.875

    y=23/4 or 5.75

    Step-by-step explanation:

    2x+4=y

    4y-18=5

    substitute the value of y into an equation

    4 (2x+4) - 18=5

    multiply 4 to 2x and multiply 4 to 4

    8x+16-18=5

    subtract 16 to 18

    8x-2=5

    add 2 to 5

    8x=7

    divide both sides by 8

    x=7/8 or 0.875

    substitute the value of x into an equation

    4y-18=5

    add 18 to 5

    4y=23

    divide both sides by 4

    y=23/4 or 5.75

    (7/8,23/4) or (0.875,5.75)
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