20道 谢
追答1.2x+3y=25,x+y=10;
2.x/y=2,x+y=6;
3.x+2y=6,y+2x=10;
4.6x+5y=16,xy=2;
6.4x-3y=21,2xy=48;
7.4x=6y,x+2y=7;
8.8x-3y=15,x+4y=15;
9.xy=5,3x+y=8;
10.2x+5=17,3x-2y=10;
11.x-y=6;xy=55;
12.3x-y=8,4y-x=1;
13,xy/3=1,x+y=4;
14.7y+x=8,2x-y=1;
15.6x-y=10,6y-x=10;
16.3x+2y=12,2x+3y=11;
17.4x=3,x+y=1;
18.x=y,x+y=7;
19.7x+3y=42,xy=21;
20.5x-2y=4,x+y=12;