摘要:
优美开头摘抄(小蝌蚪彩开头结尾摘抄大全)71x-y=291194x+y=1034(36)11x-43y=-136185x+y=8330优美开头摘抄(小蝌蚪彩...
优美开头摘抄(小蝌蚪彩开头结尾摘抄大全)
71x-y=2911
94x+y=1034
(36)11x-43y=-1361
85x+y=8330
优美开头摘抄(小蝌蚪彩开头结尾摘抄大全)
31x-y=713
71x-y=5183
14x-y=840
解答题
优美开头摘抄(小蝌蚪彩开头结尾摘抄大全)
(64)58x-28y=2724
17x-y=1394
答案:x=82y=54
师大七年级上有理数测试三
28x+y=1064
(73)65x-79y=-5815
10.若a、b互为相反数,c、d互为倒数,则(a+b)20-(cd)20=.