Answer:
x=-3 and y=-3
Step-by-step explanation:
Given the following simultaneous equations:
[tex]6x-6y=0\\3x+y=-12\\[/tex]
We take the first equation and rearrange it:
[tex]6x-6y=0\\6x-6y+6y=0+6y\\6x=6y\\x=y[/tex]
We can substitute in the second equation to find the value of x:
[tex]3x+x=-12\\4x=-12\\x=-3[/tex]
Since [tex]x=y[/tex] therefore y=-3.
