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30 August, 02:14

Solve, using linear combination.

5x + y = 2

4x + y = 4

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Answers (1)
  1. 30 August, 02:35
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    5x+y=2

    4x+y=4

    5x+y=2

    -1 (4x+y=2)

    5x+y=2

    -4x-y=2

    your y'all cancel out so you r left with

    x=-2

    then you plug the x in to one of the equations

    5 (-2) + y=2

    -10+y=2

    then add 10 to both sides

    y=12

    Answer: x = - 2 y = 12

    there's the work and all its simple you just have to figure out how to get rid of y or x (which ever is easier) and you can figure it out after that
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