Answer:
x = 3
y = 6
Step-by-step explanation:
y = 2x
x = 2y - 9
=> x = 2(2x) - 9
=> x = 4x - 9
=> 9 = 4x - x
=> 9 = 3x
=> 3x = 9
=> x = 9/3
=> x = 3
=> y = 2(3)
=> y = 6
