chenghui guo answered 5x-2y=12 , 3x-2y=-2.X=(12+2y)/5,3*((12+2y)/5)-2y=-2,36/5+6y/5-2y=-2,-4y/5=-46/5,y=23/2;x=(12+2*23/2)/5=7.So,x=7,y=23/2.