方程组:3X+4Y+10/X+Y+2=3.5
问题描述:
方程组:3X+4Y+10/X+Y+2=3.5
4Y+3X+14+2/X+Y+2+1=2.5
修改下:(3X+4Y+10)/(X+Y+2)=3.5
(4Y+3X+14+2)/(X+Y+7+2+1)=2.5
答
(3X+4Y+10)/(X+Y+2)=3.5
3x+4y+10=3.5x+3.5y+7
0.5x-0.5y=3
(4Y+3X+14+2)/(X+Y+7+2+1)=2.5
4y+3x+16=2.5x+2.5y+25
1.5y+0.5x=9
0.5x-0.5y=3
2y=6
y=3,x=9验算错的