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Today, 21:03

How do you solve this question algebraically?

y=x+5 if y=3x

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Answers (1)
  1. Today, 21:40
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    Substitution ... sub in 3x for y in the other equation

    y = x + 5

    3x = x + 5

    3x - x = 5

    2x = 5

    x = 5/2

    now sub 5/2 in for x in either of the original equations to find y

    y = 3x

    y = 3 (5/2)

    y = 15/2

    solution is (5/2, 15/2)
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