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18 October, 22:13

Use substitution to solve the system of equations.

y = - 2x

x - 3y = 21

(3, 4)

(-6, 12)

(3, - 6)

(-2, - 6)

+2
Answers (2)
  1. 19 October, 01:02
    0
    X-3 * (-2x) = 21

    x+6x=21

    7x=21

    X=21/7

    X=3

    Now you substitute x=3 in the other equation

    Y=-2*3

    Y=-6
  2. 19 October, 02:03
    0
    The answer is (3,-6)
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