5x-2y=-15 dan 3x+2y=13 maka nilai x-2y=…

5x-2y=-15
3x+2y=13
________+
8x=2
x=¼
5/4 – 2y=15
y= -55/8
=-6 ⅞

x-2y=¼-(2×(-55/8))
=56/4
=14