1、解下列方程组：2x+3y=74x-y=6答案：x=3，y=12、求解下面的方程组：x+y=83x-2y=5答案：x=3，y=53、解方程组：5x+4y=123x-2y=1答案：x=2，y=14、解下列方程组：2x-3y=104x+5y=23...

1、66x+17y=396725x+y=1200答案：x=48y=472、18x+23y=230374x-y=1998答案：x=27y=793、44x+90y=7794x+y=3476答案：x=79y=484、76x-66y=408230x-y=2940答案：x=98y=515...

1)2x+3y＝－13x-2y＝102)2x+5y＝24x+1y＝43)x+2y=15①4x+5y=65②把②-①*4解得y=5把y代入①解得x=10∴原方程组的解为｛X=10y=54)5x-6y=-3①x+2y=25②把②*3+①...

30x-y=2940答案：x=98y=51(5)67x+54y=854671x-y=5680答案：x=80y=59(6)42x-95y=-141021x-y=1575答案：x=75y=48(7)47x-40y=85334x-y=2006答案：x=59y=48(8)19x-32y...

1)66x+17y=396725x+y=1200答案：x=48y=47(2)18x+23y=230374x-y=1998答案：x=27y=79(3)44x+90y=7794x+y=3476答案：x=79y=48(4)76x-66y=408230x-y=2940答案：x=98y=...

二元一次方程组1)66x+17y=396725x+y=1200答案：x=48y=47(2)18x+23y=230374x-y=1998答案：x=27y=79(3)44x+90y=7794x+y=3476答案：x=79y=48(4)76x-66y=408230x-y=2940...

1.2x+9y=813x+y=342.9x+4y=358x+3y=303.7x+2y=527x+4y=624.4x+6y=549x+2y=875.2x+y=72x+5y=196.x+2y=213x+5y=567.5x+7y=525x+2y=228.5x+5y=657x+7y=2039.8x+4y...

答案：x=79y=48(4)76x-66y=408230x-y=2940答案：x=98y=51(5)67x+54y=854671x-y=5680答案：x=80y=59(6)42x-95y=-141021x-y=1575答案：x=75y=48(7)47x-40y=85334x-y...

答案：x=48y=47(2)18x+23y=230374x-y=1998答案：x=27y=79(3)44x+90y=7794x+y=3476答案：x=79y=48(4)76x-66y=408230x-y=2940答案：x=98y=51(5)67x+54y=854671x-y...

1)66x+17y=396725x+y=1200答案：x=48y=47(2)18x+23y=230374x-y=1998答案：x=27y=79(3)44x+90y=7794x+y=3476答案：x=79y=48(4)76x-66y=408230x-y=2940答案：x=98y=...