10.8 x+ 14.8y =(x+y) 12.3
The reciprocal relationship used is the amount of money to buy two kinds of sugar.
The former is divided by the latter multiplied by a * * * weight multiplied by the mixed price per kilogram.
You can get 2.5y =1.5x.
x/y=5/3
Hello, now Chen Lin will answer the above questions. The general method of finding the inverse matrix, the formula