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2 years ago

7

{y=2x+14 {−4x−y=4 What can I substitute "y" for in both equations?

1 answer:

trapecia [35]2 years ago

8 0

y=2x+14
−4x−y=4 so y = -4x -4

so

2x + 14 = -4x - 4

2x + 4x = -4 - 14

6x = -18

x = -3

y = 2x + 14

y = 2(-3) + 14

y = -6 + 14

y = 8

answer x = -3 and y =8

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What are the roots of the equation? x2−x−42=0 Enter your answers in the boxes.

Levart [38]

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Step-by-step explanation:

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