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7 December, 03:39

Use substitution to solve the system

5x+4y=12

Y=2x-10

+2
Answers (2)
  1. 7 December, 03:57
    0
    Ok so do you know the steps for substitution
  2. 7 December, 07:05
    0
    Substitute the 2x-10 in for I in the first equation:

    5x+4 (2x-10) = 12

    Distribute the 4:

    5x+8x-40=12

    Add 40 to both sides and combine the x terms:

    13x=52

    Divide by 13:

    x=4

    Plug the 4 into either equation for the x value:

    y=2 (4) - 10

    y=8-10

    y=-2

    Answer:

    X=4

    Y=-2

    To check you can plug them into either one of the equations.
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