Question

What is x-2y=0 and then also 2x-5y=-4

Answer 1

x + 2y = 0 ⇒ 2x + 4y = 0
2x - 5y = -4 ⇒ 2x - 5y = -4
9y = 4
9 9
y = 4/9
x + 2(4/9) = 0
x + 8/9 = 0
-8/9 -8/9
x = -8/9
(x, y) = (-8/9, 4/9)

Answer 2

`x-2y=0\:/(-2) \\ 2x-5y=-4 \\ \\ =>-2x+4y=0 \\ 2x+-5y=-4 \\ \\ =>-y=-4 \\ y=4 \\ \\ x-2.4=0 \\ =>x-8=0 \\ x=8 \\ \\ \framebox[1.1\width]{Good Luck!} \par`