(1)y=2/3x3x-4y=2(2)x+2y=03x+4y-6=0(3)3x+2y=-23x-y=4(4)6x+7y=-195y-6x=-17(5)s=2t=03s+t-10=0(6)x/3-y/4=1x/2+y/3=2