（1）6x-7=4x-5 6x-4x=7-52x=2x=1(2)1/2x-6=3/4x 3/4x-1/2x=-61/4x=-6x=-24(3)x+3x=-16 4x=-16x=-4(4)16y-2.5y-7.5y=5 16y-(2.5y+7.5y)=516y-10y=56y=5y=5/6(5)3x+5=4x+1 4x-3x=5-1x=4(6)9-3y=5y+55y+3y=9-58y=4y=1/...