方程一:
14X=850-6y;
x=(850-6y)/14;
方程二:
6X=650-14y;
x=(650-14y)/6;
由一和二可得:
(850-6y)/14=(650-14y)/6
解一元程得Y值为:
850/14-6y/14=650/6-14y/6
-6y/14+14y/6=650/6-850/14
-18y/42+98y/42=(4550-2550)/42
90y/42=2000/42
90y=2000
y=200/9
将Y值代入任何一方程则求得X值.