17.丁丁、亮亮和军军三人去书店买《太空大战》.如果用丁丁带的钱买三本,还差55元;用亮亮带的钱买三本,还差69元;用三人带的钱去买,就多30元.已知军军带了37元,那么买一本《太空大战》要用多少钱?
0 159678 159686 159692 159696 159702 159704 159708 159714 159716 159722 159728 159732 159734 159738 159744 159746 159752 159756 159758 159762 159764 159768 159770 159772 159773 159774 159776 159777 159778 159780 159782 159786 159788 159792 159794 159798 159804 159806 159812 159816 159818 159822 159828 159834 159836 159842 159846 159848 159854 159858 159864 159872 199269