p46~47:1⑴x=1⑵x=5⑶x=8⑷x=3 2⑴x=-7⑵x=-1⑶x=15⑷x=3 3⑴x=8⑵x=6⑶x=-1⑷x=-4 4 ⑴x=-10⑵x=13⑶x=2⑷x=-7 5:5 6⑴1⑵-2 7:3 8:a=2, b+-5
당신은 어느 그룹입니까?