Question

Without graphing is the system independent, dependent, or inconsistent?

-2x-y=9
3x-4y=-8
Could someone please explain

Answer 1

y = -2 x - 9
3 x - 4(-2 x - 9 ) = -8
3 x + 8 x + 36 = - 8
11 x = - 44, x = - 4
y = 8 - 9 , y = -1
This is a unique solution, the system is independent.