文档介绍：+9y=813x+y=+4y=358x+3y=+2y=527x+4y=+6y=549x+2y=+y=72x+5y=+2y=213x+5y=+7y=525x+2y=+5y=657x+7y=+4y=56x+4y=+7y=415x+8y=+5y=543x+4y=+8y=154x+y=+6y=249x+5y=+2y=624x+3y=+4y=467x+4y=+7y=1354x+y=+8y=51x+6y=+3y=994x+7y=+2y=383x+6y=+5y=457x+9y=+2y=287x+8y=+6y=143x+3y=+4y=672x+8y=+4y=527x+6y=+y=94x+6y=+6y=486x+3y=+2y=167x+y=+9y=778x+6y=+8y=687x+6y=+2y=227x+2y=471)66x+17y=396725x+y=1200(2)18x+23y=230374x-y=1998(3)44x+90y=779644x+y=3476(4)76x-66y=408230x-y=2940(5)67x+54y=854671x-y=5680(6)42x-95y=-141021x-y=1575(7)47x-40y=85334x-y=2006(8)19x-32y=-178675x+y=4950(9)97x+24y=720258x-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=8259x+y=2183(16)91x+70y=584595x-y=4275(17)29x+44y=528188x-y=3608(18)25x-95y=-435540x-y=2000(19)54x+68y=328478x+y=1404(20)70x+13y=352052x+y=2132(21)48x-54y=-318624x+y=1080(22)36x+77y=761947x-y=799(23)13x-42y=-271731x-y=1333(24)28x+28y=333252x-y=4628(25)62x-98y=-256446x-y=20241)答案:x=48y=47(2)答案:x=27y=79