二元一次方程组习题及答案道文档格式.docx

1、18.9x+3y=994x+7y=9519.9x+2y=383x+6y=1820.5x+5y=457x+9y=6921.8x+2y=287x+8y=6222.x+6y=143x+3y=2723.7x+4y=672x+8y=2624.5x+4y=527x+6y=7425.7x+y=94x+6y=1626.6x+6y=486x+3y=4227.8x+2y=167x+y=1128.4x+9y=778x+6y=9429.6x+8y=687x+6y=6630.2x+2y=227x+2y=471）66x+17y=396725x+y=1200答案：x=48y=47（2）18x+23y=230374x-y=1

2、998x=27y=79（3）44x+90y=779644x+y=3476x=79y=48（4）76x-66y=408230x-y=2940x=98y=51（5）67x+54y=854671x-y=5680x=80y=59（6）42x-95y=-141021x-y=1575x=75y=48（7）47x-40y=85334x-y=2006x=59y=48（8）19x-32y=-178675x+y=4950x=66y=95（9）97x+24y=720258x-y=2900x=50y=98（10）42x+85y=636263x-y=1638x=26y=62（11）85x-92y=-251827x-y=

3、486x=18y=44（12）79x+40y=241956x-y=1176x=21y=19（13）80x-87y=215622x-y=880x=40y=12（14）32x+62y=513457x+y=2850x=50y=57（15）83x-49y=8259x+y=2183x=37y=61（16）91x+70y=584595x-y=4275x=45y=25（17）29x+44y=528188x-y=3608x=41y=93（18）25x-95y=-435540x-y=2000x=50y=59（19）54x+68y=328478x+y=1404x=18y=34（20）70x+13y=352052x

4、+y=2132x=41y=50（21）48x-54y=-318624x+y=1080x=45y=99（22）36x+77y=761947x-y=799x=17y=91（23）13x-42y=-271731x-y=1333x=43y=78（24）28x+28y=333252x-y=4628x=89y=30（25）62x-98y=-256446x-y=2024x=44y=54（26）79x-76y=-438826x-y=832x=32y=91（27）63x-40y=-82142x-y=546x=13y=41（28）69x-96y=-120942x+y=3822x=91y=78（29）85x+67y

5、=733811x+y=308x=28y=74（30）78x+74y=1292814x+y=1218x=87y=83（31）39x+42y=533159x-y=5841x=99y=35（32）29x+18y=191658x+y=2320x=40y=42（33）40x+31y=604345x-y=3555x=79y=93（34）47x+50y=859845x+y=3780x=84y=93（35）45x-30y=-145529x-y=725x=25y=86（36）11x-43y=-136147x+y=799x=17y=36（37）33x+59y=325494x+y=1034x=11y=49（38）8

6、9x-74y=-273568x+y=1020x=15y=55（39）94x+71y=751778x+y=3822x=49y=41（40）28x-62y=-493446x+y=552x=12y=85（41）75x+43y=847217x-y=1394x=82y=54（42）41x-38y=-118029x+y=1450x=50y=85（43）22x-59y=82463x+y=4725x=75y=14（44）95x-56y=-40190x+y=1530（45）93x-52y=-85229x+y=464x=16y=45（46）93x+12y=882354x+y=4914x=91y=30（47）21x

7、-63y=8420x+y=1880x=94y=30（48）48x+93y=975638x-y=950x=25y=92（49）99x-67y=401175x-y=5475x=73y=48（50）83x+64y=929190x-y=3690x=41y=92（51）17x+62y=321675x-y=7350x=98y=25（52）77x+67y=273914x-y=364x=26y=11（53）20x-68y=-459614x-y=924x=66y=87（54）23x+87y=411083x-y=5727x=69y=29（55）22x-38y=80486x+y=6708x=78y=24（56）20

8、x-45y=-352056x+y=728x=13y=84（57）46x+37y=708561x-y=4636x=76y=97（58）17x+61y=408871x+y=5609x=79y=45（59）51x-61y=-190789x-y=2314x=26y=53（60）69x-98y=-240421x+y=1386x=66y=71（61）15x-41y=75474x-y=6956x=94y=16（62）78x-55y=65689x+y=5518x=62y=76（63）29x+21y=163331x-y=713x=23y=46（64）58x-28y=272435x+y=3080x=88y=85（

9、65）28x-63y=-225488x-y=2024（66）43x+50y=706485x+y=8330x=98y=57（67）58x-77y=117038x-y=2280x=60y=30（68）92x+83y=1158643x+y=3010x=70y=62（69）99x+82y=605552x-y=1716x=33y=34（70）15x+26y=172994x+y=8554x=91y=14（71）64x+32y=355256x-y=2296x=41y=29（72）94x+66y=1052484x-y=7812x=93y=27（73）65x-79y=-581589x+y=2314x=26y=9

10、5（74）96x+54y=621663x-y=1953x=31y=60（75）60x-44y=-35233x-y=1452x=44y=68（76）79x-45y=51014x-y=840x=60y=94（77）29x-35y=-21859x-y=4897x=83y=75（78）33x-24y=190530x+y=2670x=89y=43（79）61x+94y=1180093x+y=5952x=64y=84（80）61x+90y=500148x+y=2448x=51y=21（81）93x-19y=286x-y=1548x=18y=88（82）19x-96y=-591030x-y=2340x=78

11、y=77（83）80x+74y=808896x-y=8640x=90y=12（84）53x-94y=194645x+y=2610x=58y=12（85）93x+12y=911728x-y=2492x=89y=70（86）66x-71y=-167399x-y=7821x=79y=97（87）43x-52y=-174276x+y=1976x=26y=55（88）70x+35y=829540x+y=2920x=73y=91（89）43x+82y=475711x+y=231x=21y=47（90）12x-19y=23695x-y=7885x=83y=40（91）51x+99y=803171x-y=29

12、11x=41y=60（92）37x+74y=440369x-y=6003x=87y=16（93）46x+34y=482071x-y=5183x=73y=43（94）47x+98y=586155x-y=4565x=83y=20（95）30x-17y=23928x+y=1064x=38y=53（96）55x-12y=411279x-y=7268x=92y=79（97）27x-24y=-45067x-y=3886x=58y=84（98）97x+23y=811914x+y=966x=69y=62（99）84x+53y=1127570x+y=6790x=97y=59（100）51x-97y=29719x-y=1520x=80y=39