dominiquea dominiquea

03-03-2020
Mathematics

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Solve by using substitution. SHOW YOUR WORK. y=-2x – 1
y = 8x + 19

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SilvanaMartins SilvanaMartins

03-03-2020

Answer: x= -2; y = 3

Step-by-step explanation:

y=-2x – 1

y = 8x + 19 -

replacing "y"

-2x – 1 = 8x + 19

-2x - 8x = 19 + 1

-10x = 20

x = 20/-10

x= -2

y=-2x – 1

y= -2.(-2) - 1

y= 4 - 1

y = 3

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