丨x-y+3丨与丨x+y-5丨互为相反数,x=?,y=?
问题描述：
丨x-y+3丨与丨x+y-5丨互为相反数,x=?,y=?
答
丨x-y+3丨与丨x+y-5丨互为相反数,则x-y+3=0,x+y-5=0
解得x=1,y=4