﹙x+y﹚/2+﹙x-y﹚3=6 2﹙x+y﹚-3x+3y=24

﹙x+y﹚/2+﹙x-y﹚3=6 2﹙x+y﹚-3x+3y=24

x=y=6
Two formula addition
x+y=12
(1) Formula * 4 - (2)
x-y=0