文档介绍：+y=292x+8y=262x+9y=813x+y=+6y=245x+4y=+5y=467x+6y=749x+4y=358x+3y=+2y=627x+y=+3y=364x+6y=167x+2y=527x+4y=+4y=466x+6y=+4y=426x+3y=424x+6y=549x+2y=+7y=1358x+2y=+y=417x+y=112x+y=72x+5y=+8y=514x+9y=+6y=278x+6y=94x+2y=213x+5y=+3y=996x+8y=+7y=957x+6y=665x+7y=525x+2y=+2y=382x+2y=+6y=187x+2y=475x+5y=657x+7y=.(1)66x+17y=39678x+4y=565x+5y=4525x+y=1200x+4y=217x+9y=69答案:x=48y=4721.(2)18x+23y=23035x+7y=418x+2y=2874x-y=19985x+8y=447x+8y=62答案:x=27y=7922.(3)44x+90y=77967x+5y=54x+6y=1444x+y=34763x+4y=383x+3y=27答案:x=79y=4823.(4)76x-66y=4082x+8y=157x+4y=6730x-y=2940答案:x=98y=51答案:x=37y=61答案:x=32y=9167x+54y=8546(16)91x+70y=5845(27)63x-40y=-82171x-y=568095x-y=427542x-y=546答案:x=80y=59答案:x=45y=25答案:x=13y=4142x-95y=-1410(17)29x+44y=5281(28)69x-96y=-120921x-y=157588x-y=360842x+y=3822答案:x=75y=48答案:x=41y=93答案:x=91y=7847x-40y=853(18)25x-95y=-4355(29)85x+67y=733834x-y=200640x-y=200011x+y=308答案:x=59y=48答案:x=50y=59答案:x=28y=7419x-32y=-1786(19)54x+68y=3284(30)78x+74y=1292875x+y=495078x+y=140414x+y=1218答案:x=66y=95答案:x=18y=34答案:x=87y=8397x+24y=7202(20)70x+13y=3520(31)39x+42y=533158x-y=290052x+y=213259x-y=5841答案:x=50y=98答案:x=41y=50答案:x=99y=3542x+85y=6362(21)48x-54y=-3186(32)29x+18y=191663x-y=163824x+y=108058x+y=2320答案:x=26y=62答案:x=45y=99答案:x=40y=4285x-92y=-2518(22)36x+77y=7619(33)40x+31