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15 March, 17:21

X=3y-1

2x+y=12

Solve the system of equations using the substitution method

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Answers (1)
  1. 15 March, 20:38
    0
    Substitute the top equation in as X in the 2nd equation.

    2 (3y-1) + y=12

    Simplify to:

    6y-2+y=12

    7y-2=12

    Add 2 to both sides

    7y=14

    Divide 7 from both sides

    y=2

    Find X by substituting y in the first equation

    X=3 (2) - 1

    X=6-1

    X=5

    x=5 y=2
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