[질문] A급수학 76쪽 9번부터 계속답좀불러주세요 8가

10.3/4 11(1)x/z=5/6 , y/z=11/4 (2)x=20,y=66,z=24 12.4 13.x=2,1 14.a=6,b=-4 15.1 16.m=24,n=-3 17.111/70 18.a=3 , b=-2 19.x=-3, y=-2 20.(1)x+y=2, xy=03