⑴ 3(x-1)=y+5……①5(y-1)=3(x+5)……②由①得 y=3 x-8……③将③代入②得5(3x-8-1)=3(x+5)→ 15x-45=3x+15→12x=60得x=5……④将④代入①3(5-1)=y+5得y=7⑵ 5x-3y=16……①3x-5y=0……②①×3-②×5得(15 x-9y)-(15x-25y)=48-0→14 y=48→y=24/7……③将③代入①5x-3×24/7=16→5x=40/7→x=8/7