来自汪辰的问题
解方程3(2X-Y)+4(X-2Y)=872(3X-Y)-3(X-Y)=821-0.3(Y-2)=(X+1)/5(Y-3)/4=(4X+9)/20-15X+Y=3(2X-Y)+4(X-2Y)=872(3X-Y)-3(X-Y)=821-0.3(Y-2)=(X+1)/5(Y-3)/4=(4X+9)/20-15X+Y=28000.96X+0.64Y=2800*0.92
解方程3(2X-Y)+4(X-2Y)=872(3X-Y)-3(X-Y)=821-0.3(Y-2)=(X+1)/5(Y-3)/4=(4X+9)/20-15X+Y=
3(2X-Y)+4(X-2Y)=87
2(3X-Y)-3(X-Y)=82
1-0.3(Y-2)=(X+1)/5
(Y-3)/4=(4X+9)/20-15
X+Y=2800
0.96X+0.64Y=2800*0.92
1回答
2020-05-29 19:46