can you tell me how to solve this problem using substitution step by step? y = -2x – 9 and 6x – 5y = – 19

Question

can you tell me how to solve this problem using substitution step by step?

y = -2x – 9 and 6x – 5y = – 19

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Helga 4 years 2021-08-24T13:54:17+00:00 1 Answers 12 views 0

Answers ( )

  1. binhan
    0
    2021-08-24T13:56:03+00:00
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    Answer:

    x = -4

    Step-by-step explanation:

    The first equation tells us what y is equal to. We then substitute wherever there is a y with what y equals.

    y = -2x – 9

    6x – 5y = -19

    6x – 5(-2x-9) = -19

    6x + 10x + 45 = -19

    16x + 45 = -19

    16x = -64

    x = -4

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