1.N≤45,N最大为42
2.X+Y=1000 ·······①
1.06X+0.98Y=1000*1.044
3.4X-3Y-6Z=0 ······①
X+2Y-7Z=0 ······②
②×4=4X+8Y-28Z=0 ······③
③-②=11Y-22Z=0
=Y-2Z=0
...
1.N≤45,N最大为42
2.X+Y=1000 ·······①
1.06X+0.98Y=1000*1.044
3.4X-3Y-6Z=0 ······①
X+2Y-7Z=0 ······②
②×4=4X+8Y-28Z=0 ······③
③-②=11Y-22Z=0
=Y-2Z=0
...