emilycorona092342 emilycorona092342

14-12-2020
Mathematics

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3) Solve the system using substitution. Show all work.

-4x + 3y = 23
y = -7x - 9

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hakang36 hakang36

15-12-2020

Answer:

x = -2

Step-by-step explanation:

-4x + 3y = 23

y = -7x - 9 // *-3

-4x + 3y = 23

-3y = 21x -27

+++++++++++++++++++

-4x = 21x + 50

-50 = 25x

x = -2

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