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21 June, 08:58

How to solve this using substitution. Y=3x and x+y=4

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Answers (2)
  1. 21 June, 09:05
    0
    X+3x=4

    4x=4

    x=1

    y means 3x so 3 times1

    y will be 3
  2. 21 June, 11:05
    0
    Plug 3x into the second equation and solve for x. then plug x into the first equation to solve for y.
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