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26 October, 03:28

Solve the system of equations using the substitution method.

-3x - y = 15

y = - 8x

+5
Answers (1)
  1. 26 October, 04:24
    0
    x = 3, y = - 24

    Step-by-step explanation:

    -3x - y = 15

    y = - 8x

    Substitute the value of y into the first equation.

    -3x - (-8x) = 15

    -3x + 8x = 15

    5x = 15

    x = 3

    Put the value of x into the second equation.

    y = - 8 * 3

    y = - 24
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