设一台空调原价是X,另一台原价是Y,根据题意,列出方程1.1X=0.9Y,所以X=0.818Y.原价总和就是1.818Y.
而调价后总和1.1X+0.9Y=0.9Y+0.9Y=1.8Y,
1.818Y>1.8Y,所以亏本.