文档介绍：+4y=+9y=817x+4y=423x+y=+7y=1359x+4y=358x+3y=304x+y=+2y=+8y=51x+6y=277x+4y=+6y=+3y=994x+7y=959x+2y=+y=79x+2y=383x+6y=182x+5y=+5y=+2y=217x+9y=693x+5y=+7y=528x+2y=+8y=625x+2y=+5y=65x+6y=+3y=277x+7y=2037x+4y=+4y=+8y=26x+4y=+7y=415x+4y=+8y=447x+6y=+y=+5y=543x+4y=384x+6y=166x+6y=48x+8y=+3y=424x+y=+2y=163x+6y=+5y=467x+y=+9y=779x+2y=+3y=368x+6y=(13)6x+8y=6880x-87y=-y=8807x+6y=66(14)2x+2y=+62y=513457x+y=28507x+2y=47(15)83x-49y=82591)66x+17y=396725x+y=2183x+y=1200(16)18x+23y=23037491x+70y=584595(2)x-y=4275x-y=1998(17)29x+44y=528188(3)44x+90y=779644x-y=3608x+y=3476(18)76x-66y=408230(4)25x-95y=-435540x-y=2000x-y=2940(19)54x+68y=328478(5)67x+54y=854671x+y=1404x-y=5680(20)42x-95y=-14102170x+13y=352052(6)x+y=2132x-y=1575(21)47x-40y=8533448x-54y=-318624(7)x+y=1080x-y=2006(22)19x-32y=-178675(8)36x+77y=761947x-y=799x+y=4950(23)97x+24y=720258(9)13x-42y=-271731x-y=1333x-y=2900(24)28x+28y=33325242x+85y=636263(10)x-y=4628x-y=1638(25)(11)85x-92y=-25182762x-98y=-256446x-y=2024x-y=48679x+40y=241956(12)x-y=(20)答案:x=41y=50(21)答案:x=45y=99(22)答案:x=17y=91(23)答案:x=43y=78(24)答案:x=89y=30(25)答案:x=44y=54x=48y=47答案:1)x=27y=79(2)答案:x=79y=48(3)答案:x=98y=51答案:(4)x=80y=59(5)答案:x=75y=48(6)答案:x=59y=48(7)答案:x=66y=95(8)答案:x=50y=98(9)答案:x=26y=62(10)答案:x=18y=44(11)答案:x=21y=19(12)答案:x=40y=12(13)答案:x=50y=57(14)答案:x=37y=61(15)答案:x=45y=25答案:(16)x=41y=93(17)答案:x=50y=59(18)答案:x=18y=34答案:(19)-y=2900(10)42x+85y=636263x-y=1638(11)85x-92y=-251827x-y=486(12)79x+40y=241956x-y=1176(13)80x-87y=215622x-y=880(14)32x+62y=513457x+y=2850(15)83x-49y=82(1)66x+17y=396725x+y=120059x+y=2183(2)18x+23y=2303(16)91x+70y=584595x-y=427574x-y=1998(17)29x+44y=5281(3)44x+90y=779688x-y=360844x+y=3476(18)25x-95y=-4355(4)76x-66y=408240x-y=200030x-y=2940(19)54x+68y=3284(5)67x+54y=854671x-y=568078x+y=1404(20)70x+13y=3520(6)4