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16 February, 03:36

X + y = 3

3x + 4y = 3

using substitution how would you get x and y?

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Answers (1)
  1. 16 February, 07:16
    0
    The solution is: (x, y) = (9, - 7)

    Step-by-step explanation:

    Step 1: Solve one of the equations for either x = or y =. We will solve second equation for y.

    x+y=3

    y=3-x

    Step 2: Substitute the solution from step 1 into the second equation.

    3x+4 (3-x) = 5

    Step 3: Solve this new equation.

    3x+4 (3-x) = 5

    3x+12-4x=3

    -x+12=3

    -x=3-12

    x=9

    Step 4: Solve for the second variable

    y=3-x

    y=3-9

    y=-7

    The solution is: (x, y) = (9, - 7)
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