{7x-3y+1=0,4x-5y+17=0
问题描述:
{7x-3y+1=0,4x-5y+17=0
答
{7X-3Y+1=0,4X-5Y+17=0,推出{28X-12Y+4=0,28X-35Y+119=0,两式相减得,23Y=115,Y=5,带入原式得X=2.
{7x-3y+1=0,4x-5y+17=0
{7X-3Y+1=0,4X-5Y+17=0,推出{28X-12Y+4=0,28X-35Y+119=0,两式相减得,23Y=115,Y=5,带入原式得X=2.