(1)∵X-4Y=3 X=3+4Y,代入下式3(3+4Y)-2Y=4∴9+12Y-2Y=4∴10Y=-5∴Y=-1/2将Y代入X-4Y=3得X=1 (2)M/2+N/3=13∴M/2=13-N/3∴M=(13-N/3)*2代入M/3-N/4=3(13-N/3)*2/3-N/4=3经过通分后可得N=12代入M/2+N/3=13可得M=18...
(1)∵X-4Y=3 X=3+4Y,代入下式3(3+4Y)-2Y=4∴9+12Y-2Y=4∴10Y=-5∴Y=-1/2将Y代入X-4Y=3得X=1 (2)M/2+N/3=13∴M/2=13-N/3∴M=(13-N/3)*2代入M/3-N/4=3(13-N/3)*2/3-N/4=3经过通分后可得N=12代入M/2+N/3=13可得M=18...