Solve each system using SUBSTITUTION. Remember to check! 2) y = –2x – 1 y = 3x – 16

Question

Solve each system using SUBSTITUTION. Remember to check!

2) y = –2x – 1

y = 3x – 16

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Ngọc Khuê 4 years 2021-08-23T03:15:00+00:00 1 Answers 16 views 0

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  1. ThanhThu
    0
    2021-08-23T03:16:55+00:00
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    Answer:

    \left \{ {{x=3} \atop {y=-7}} \right.

    Step-by-step explanation:

    We can directly substitute y of the first equation to the second equation.

    -2x – 1 = 3x – 16

    5x = 15

    x = 3

    Substituting back to any of the two equations, we get y = -2(3)-1 = -7.  If you check with the second equation, y = 3(3)-16 = -7 as well.

    Therefore \left \{ {{x=3} \atop {y=-7}} \right..

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