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10-12-2021
Mathematics

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X=-2y,x-y=9 solve by substitution SHOW ALL WORK

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tinybooyah tinybooyah

10-12-2021

Answer:

x = 6, y = -3

Step-by-step explanation:

x = -2y

x-y = 9

Substitute x = -2y into the equation.

;(-2y)-y = 9

-3y = 9

y = 9/-3

y = -3

Substitute y = -3 into the equation.

x = -2y

x = -2(-3)

x = 6

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