学校用400元买了152颗树苗，青苗和松树苗各多少棵？已知青苗，两块钱一颗，松树苗五元一颗
\u5b66\u6821\u7528400\u5143\u4e70\u4e86152\u68f5\u6811\u82d7\u4e1c\u9752\u82d7\u548c\u677e\u6811\u82d7\u5404\u6709\u591a\u5c11\u68f5\uff1f \u51ac\u9752\u6811\u5355\u4ef7\uff1a2\u5143 \u677e\u6811\u5355\u4ef7\uff1a5\u5143\u5047\u8bbe152\u68f5\u5168\u90e8\u662f\u51ac\u9752\uff0c\u5e94\u8be5\u6709
2\u00d7152\uff1d304\uff08\u5143\uff09
\u6bd4\u5b9e\u9645\u5c11
400\uff0d304\uff1d96\uff08\u5143\uff09
\u677e\u6811\u6709
96\u00f7\uff085\uff0d2\uff09\uff1d32\uff08\u68f5\uff09
\u51ac\u9752\u6709
152\uff0d32\uff1d120\uff08\u68f5\uff09
\u89e3\uff1a\u8bbe\u4e70\u4e86\u51ac\u9752X\u9897\uff0c\u677e\u6811Y\u9897\uff0c\u6839\u636e\u9898\u610f\u5f97\uff1a
X+Y=152
2X+5Y=400
\u89e3\u65b9\u7a0b\u7ec4\u5f97
X=120
Y=32
绛旓細涓銆佺畻鏈硶鍋囪鎵鏈夋爲鑻楅兘鏄啲闈掞紝姣忔５2鍏冿紝閭ｄ箞152妫垫爲鑻鐨勬讳环鏄152脳2=304鍏冦傚墿涓嬬殑閽辨槸400-304=96鍏冦傛澗鏍戞瘡妫垫瘮鍐潚璐3鍏冿紝鎵浠ョ敤鍓╀笅鐨96鍏冨彲浠ヤ拱96梅3=32妫垫澗鏍戙傚洜姝わ紝鍐潚鏍戣嫍鏈152-32=120妫点備簩銆佹柟绋嬫硶璁惧啲闈掓爲鑻楁湁X妫碉紝鏉炬爲鑻楁湁152-X妫点傛牴鎹鐩紝鍙互鍒楀嚭鏂圭▼锛2X + 5(152...
绛旓細涓锛岀畻鏈硶 鍋囪锛152妫垫爲鑻锛岄兘鏄啲闈掞紝2脳152=304鍏冿紱浣欙細400-304=96鍏冿紱鏉炬爲涓庡啲闈掞紝鍗曟５浠锋牸宸负锛5-2=3鍏冿紱96梅3=32妫碉紝鏉炬爲鑻楁暟閲忥紱152-32=120妫碉紝鍐潚鏍戣嫍銆備簩锛屾柟绋嬫硶 璁撅細鍐潚X妫碉紝鏉炬爲152-X妫 2X+5锛152-X锛=400 2X-5X=400-760 3X=360銆乆=120妫 鍐潚120妫碉紝鏉炬爲152-120...
绛旓細152锛32锛120锛堟５锛
绛旓細鍥炵瓟锛氭檿鍊掍簡!!!鍐潚鑻120妫,鏉炬爲32妫点傝В:璁惧啲闈掕嫍涓篨妫,鏉炬爲涓篩妫点俋+Y=152 2X+5Y=400 X=152-Y 2(152-Y)+5Y=400 Y=32 X=120
绛旓細鍐潚鑻梄 妫鍜屾澗鏍戣嫍152-x妫2x+5(152-x)=4002x-760-5x=4003x=360x=120152-x=32
绛旓細璁惧啲闈掍拱浜唜棰楋紝鍒欐澗鏍涔颁簡152-x棰2x+5*(152-x)=400锛屽彲浠ユ眰鍑簒=120锛屽垯鏉炬爲锛屼拱浜32棰
绛旓細2x+5锛152-x锛=400 2x+760-5x=400 3x=360 x=120 152-120=32 鎵浠ヤ笢闈掕嫍120妫碉紝鏉鏍戣嫍32妫
绛旓細8缁19璇
绛旓細14. 榛勬皵鐞2鍏3涓,鑺辨皵鐞3鍏2涓,瀛︽牎鍏涔颁簡32涓皵鐞,鍏朵腑鑺辨皵鐞冩瘮榛勬皵鐞冨皯4涓,瀛︽牎涔鍝姘旂悆鐢ㄧ殑閽卞? 15. 涓鍙竼鑸圭殑閫熷害鏄60绫/鍒,鑸瑰湪姘存祦閫熷害涓20绫/鍒嗙殑娌充腑,浠庝笂娓哥殑涓涓腐鍙ｅ埌涓嬫父鐨勬煇涓鍦,鍐嶈繑鍥炲埌鍘熷湴,鍏辩敤3灏忔椂30鍒,杩欐潯鑸逛粠涓婃父娓彛鍒颁笅娓告煇鍦板叡璧颁簡澶氬皯绫? 16. 鐢茬伯浠撹43鍚ㄩ潰绮,...
绛旓細320妫
