x .y的值相等且4X+3y=7，则7x=7,x=1,y=1,kx+(k-1)y=3,即k+k-1=3,2k=4,k=2
∵x=y 4x+3y=7∴x=y=1代入kx+(k-1)y=3中得k+k-1=3∴k=2
