书架上有上下两层共有书本152本,下层书本是上层的3倍还多12本,上下层各有多
\u4e66\u67b6\u4e0a\u6709\u4e24\u5c42\u4e66\uff0c\u5171152\u672c \u4e0b\u5c42\u4e66\u6bd4\u4e0a\u5c42\u4e66\u76843\u500d\u8fd8\u591a12\u672c\uff0c\u4e0a\u4e0b\u4e24\u5c42\u5171\u6709\u591a\u5c11\u672c\u4e66\u8bbe\u4e0a\u5c42x\u672c,\u4e0b\u5c42\u4e3a(3x+12)\u672c,\u5219x+(3x+12)=152 \u5f97x=35
\u8bbe\u4e0a\u5c42X\u672c
X+3X+12=152
X=35
\u6216\u8005152\u201412=140
140/4=35
\u6240\u4ee5\u4e0a\u5c4235 \u4e0b\u5c42117
X+3X+12=152
解;4X=140
X=35(本)
那么3X+12=117(本)
即上层有35本,下层有117本
绛旓細鍋囪涓婂眰涓篨锛岄偅涔堜笅灞傚氨鏄3X+12锛屽垪寮忓緱 X+3X+12=152 瑙;4X=140 X=35锛堟湰锛夐偅涔3X+12=117锛堟湰)鍗充笂灞傛湁35鏈紝涓嬪眰鏈117鏈
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
绛旓細涓婂眰35锛屼笅灞117
绛旓細鏂圭▼鐨勶細瑙o細璁句笅灞傜殑鏈功涓篨鏈功锛屼笂灞傜殑涓猴紙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
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绛旓細涓婂眰姣斾笅灞傚锛8脳2=16锛堟湰锛夛紱涓婂眰鏈夛細锛128+16锛壝2=72锛堟湰锛夛紱涓嬪眰鏈夛細锛128-16锛壝2=56锛堟湰锛夛紟绛旓細涓婂眰鍘熸潵鏈夊浘涔72鏈紝涓嬪眰鍘熸潵鏈夊浘涔56鏈紟
绛旓細250-锛/190+?=5/6 250*6-6?=190*5+5?11?=1500-950 11?=550 ?=50 绛斿畨灏辨槸50 銆 棰樹腑鐨 闂彿灏辨槸X 銆傛垜涓鐫鎬ュ氨娌℃墦 灏辩敤闂彿浜
绛旓細鏈鍚庡凡缁忚鍒颁簡锛涓婁笅涓ゅ眰宸茬粡涓鏍峰浜嗭紝鎵浠ヤ笂涓嬩袱灞傚悇78鏈...
绛旓細鍥犱负濡傛灉浠庝笂灞傛嬁30鏈功鍒颁笅灞傦紝閭d箞涓婁笅涓ゅ眰鐨涔︽湰鏁颁竴鏍峰锛屾墍浠 涓婂眰姣斾笅灞傚60鏈 鎵浠 涓嬪眰涓 锛248-60锛壝2=94 涓婂眰涓 94+60=154