3Y+2X=222.2
3X+2Y=212.3
相加得 5x +5y = 434.5
x+ y = 86.9
所以 y = (3Y+2X)- 2(x+y) = 222.2 - 2x86.9= 48.4
x= 86.9 -48.4 =38.5