用代入法解下列方程组{x-y-6,2x+3y-8 {3(y-2)=x-17,2(x-1)-5y-8

问题描述:

用代入法解下列方程组{x-y-6,2x+3y-8 {3(y-2)=x-17,2(x-1)-5y-8

{x-y-6=0 (1),2x+3y-8=0 (2)x-y-6=0x=y+62(y+6)+3y-8=02y+12+3y-8=05y=-4y=-4/5x=26/5{3(y-2)=x-17,2(x-1)-5y-8=03(y-2)=x-173y-6=x-17x=3y+112(3y+11-1)-5y-8=06y+20-5y-8=0y=-12x=-25