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

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

i hope this is what you were looking for.

see attached graph

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.