1)设苹果的价格是x元,梨是y元,则有x-y=0.7,x=1.26y,解完得x=3.39,y=2.69
2)设梨的价格为x元,则有(1.26-1)x=0.7,得,梨的价格x=2.69,苹果的价格(2.69+0.7)=3.39