书架上有两层书,共有图书152本,下层书的本数比上层书的3倍还多12本,书架上下层各有多少本书?
\u4e66\u67b6\u4e0a\u6709\u4e24\u5c42\u4e66 \u5171\u6709\u56fe\u4e66152\u672c \u4e0b\u5c42\u4e66\u7684\u672c\u6570\u6bd4\u4e0a\u5c42\u4e66\u76843\u500d\u8fd8\u591a12\u672c \u4e66\u67b6\u4e0a\u4e0b\u5c42\u5404\u6709\u591a\u5c11\u672c\u8bbex\u4e3a\u4e0a\u5c42\u4e66\uff0c\u4e0b\u5c42\u4e66\u4e3ay\uff0cy=3x+12\uff0cx+3x+12=152,4x=40\uff0cx=35\uff0cy=117
\u4e0a\u5c42\uff1a\uff08152-12\uff09/\uff081+3\uff09=35,\u4e0b\u5c42\uff1a152-35=117
设上层X本X+3X+12=152
X=35
或者152—12=140
140/4=35
所以上层35 下层117
下层127,上层35,谢谢!分给我吧,
绛旓細涓婂眰35鏈紝涓嬪眰117鏈
绛旓細瑙:璁句笅灞傛湁x鏈 35脳3锛12=117鏈 绛:涓嬪眰鏈117鏈紝涓婂眰鏈35鏈 x锛3x锛12=152 4x=152锛12 4x梅4=140梅4 4=35
绛旓細涓婂眰锛氾紙152-12锛/锛1+3锛=35,涓嬪眰锛152-35=117
绛旓細鎴栬152鈥12=140 140/4=35 鎵浠ヤ笂灞35 涓嬪眰117
绛旓細鍥炵瓟锛(152脳3+12)+152
绛旓細浣犲ソ锛152-12=140(鏈級涓婂眰锛140闄や互锛1+3锛=35(鏈級涓嬪眰锛35*3+12 =105+12 =117锛堟湰锛夊笇鏈涢噰绾
绛旓細涓婂眰35锛屼笅灞117
绛旓細璁句笂灞俋鏈 X+3X+12=152 X=35 鎴栬152鈥12=140 140/4=35 鎵浠ヤ笂灞35 涓嬪眰117 濡傛灉鏈夊府鍒版偍,鐐瑰嚮銆愰噰绾充负婊℃剰绛旀銆戞寜閽嵆鍙,濡傛灉杩樻湁闂 璇峰彂甯栭噸鏂版彁闂摝
绛旓細鏂圭▼鐨勶細瑙o細璁句笅灞傜殑鏈功涓篨鏈涔︼紝涓婂眰鐨勪负锛3X+12锛夋湰銆俋+3X+12=152 4X=140 X=35 3X+12=117 绛旓細涓婂眰35鏈紝涓嬪眰117鏈傛櫘閫氱殑锛152-12梅4=35(鏈)152-35=116(鏈)绛旓細涓婂眰35鏈紝涓嬪眰117鏈傛杩庨噰绾筹紝鍙眰璐$尞锛
绛旓細涓婂眰锛氾紙152-12锛/锛1+3锛=35,涓嬪眰锛152-35=117