某市为了鼓励市民节约用水,对自来水用户按如下标准收费:每月每户用水不超过12吨的,按 某市为了鼓励居民节约用水，对自来水用户按如下标准收费；若每月...
\u67d0\u5e02\u4e3a\u4e86\u9f13\u52b1\u5e02\u6c11\u8282\u7ea6\u7528\u6c34,\u5bf9\u81ea\u6765\u6c34\u7528\u6237\u6309\u5982\u4e0b\u6807\u51c6\u6536\u8d39:\u6bcf\u6708\u6bcf\u6237\u7528\u6c34\u4e0d\u8d85\u8fc712\u5428\u7684\uff0c\u89e3\uff1a\u8bbe\u5219\u8be5\u5c45\u6c11\u8fd9\u4e2a\u6708\u5b9e\u9645\u7528\u6c34x\u5428
\u521912a+(x-12)2a=20a
x=16
\u7b54\uff1a \u8be5\u5c45\u6c11\u8fd9\u4e2a\u6708\u5b9e\u9645\u7528\u6c3416\u5428
\u8fd8\u6709\u79cd\u65b9\u6cd5\uff1a\u5c45\u6c11\u6bcf\u6708\u752812\u5428\u6c34\u5219\u6c34\u8d39\u4e3a12A
\u4f46\u5b9e\u9645\u6c34\u8d39\u4e3a20A
\u6240\u4ee520A-12A=8A\u7684\u8d85\u51fa12\u5428\u6c34\u8d39
\u8d85\u51fa12\u5428\u6c34\u6c34\u8d39\u63092A\u5143\u6bcf\u5428\u6536\u53d6
\u6240\u4ee5\u8d85\u51fa\u6c34\u4e3a8A/2A=4\u5428\u6c34
\u6240\u4ee5 \u5b9e\u9645\u7528\u6c34\u4e3a12+4=16\u5428\u6c34
\u6839\u636e\u82e5\u6bcf\u6708\u6bcf\u6237\u7528\u6c34\u4e0d\u8d85\u8fc712\u7acb\u65b9\u7c73\uff0c\u6309\u6bcf\u7acb\u65b9\u7c73a \u5143\u6536\u8d39\uff1b\u82e5\u8d85\u8fc712\u7acb\u65b9\u7c73\uff0c\u5219\u8d85\u8fc7\u90e8\u5206\u6bcf\u7acb\u65b9\u7c73\u63092a\u5143\u6536\u8d39\uff0c\u2234\u5c45\u6c11\u4e94\u6708\u4efd\u4ea4\u6c34\u8d39y\uff08\u5143\uff09\u4e0e\u7528\u6c34\u91cfx\uff08\u7acb\u65b9\u7c73\uff09\uff08x\uff1e12\uff09\u4e4b\u95f4\u7684\u5173\u7cfb\u5f0f\u4e3a\uff1ay=12a+\uff08x-12\uff09?2a=2ax-12a\uff0c\uff08x\uff1e12\uff09\uff1b\u8bbe\u8fd9\u4e2a\u6708\u5b9e\u9645\u7528\u6c34x\u5428\uff0c\u6839\u636e\u9898\u610f\u5f97\uff1a12a+\uff08x-12\uff09?2a=20a\uff0c\u89e3\u5f97\uff1ax=16\uff0e\u6545\u7b54\u6848\u4e3a\uff1ay=2ax-12a\uff08x\uff1e12\uff09\uff0c16\uff0e
用水x吨，应缴税费为12x3+(X-12)x5=5X-24小明：对于方程x/0.3-x/0.6=1化去分母中的小数点，
变形为10x/3-10x/6=10.
变形过程不正确。
x/0.3-x/0.6=1
等式两边同乘10，
则得x/3-x/6=1
应缴税费方程式为12x3+（X-12)x5
因为X大于12，前12吨水按每吨3元收费为12x3,超过12吨部分按每吨5元收费为（X-12）x5
绛旓細璁鐢ㄦ按X鍚.0.45*10+锛圶-20锛*1.5+0.8*10=14 杩欓亾绠楀紡0.45*10 灏辨槸鍛婅瘔浣10鍚ㄧ殑姘翠环 0.8*10灏辨槸鍛婅瘔浣20鍚ㄤ腑瓒呭嚭10鍚ㄧ殑閭10鍚ㄤ环鏍 鑰1.5锛圶-20锛夋槸鍛婅瘔浣犺秴鍑20鍚ㄤ互鍚庣殑浠锋牸.鑰岃繖3涓姞璧锋潵灏涓鎬讳环鏍间簡 4.5+1.5X-30+8=14 1.5X-17.5=14 1.5X=31.5 X=21 ...
绛旓細鏍规嵁鑻ユ瘡鏈堟瘡鎴风敤姘翠笉瓒呰繃12绔嬫柟绫筹紝鎸夋瘡绔嬫柟绫砤 鍏冩敹璐癸紱鑻ヨ秴杩12绔嬫柟绫筹紝鍒欒秴杩囬儴鍒嗘瘡绔嬫柟绫虫寜2a鍏冩敹璐癸紝鈭村眳姘戜簲鏈堜唤浜ゆ按璐箉锛堝厓锛変笌鐢ㄦ按閲x锛堢珛鏂圭背锛夛紙x锛12锛変箣闂寸殑鍏崇郴寮涓锛歽=12a+锛坸-12锛?2a=2ax-12a锛岋紙x锛12锛夛紱璁捐繖涓湀瀹為檯鐢ㄦ按x鍚紝鏍规嵁棰樻剰寰楋細12a+锛坸-12锛?2a=20a锛岃В寰楋細...
绛旓細鍚堝苟鍚岀被椤瑰緱 3.5x=84 瑙ｅ緱锛歺=24 绛旓細鏉庤佸笀鍏湀浠鐢ㄦ按24鍚.
绛旓細锛2锛59.8-20脳2.3-10脳3.45=2.3锛堝厓锛2.3梅4.6=0.5锛堢珛鏂圭背锛30锛0.5=30.5锛堢珛鏂圭背锛
绛旓細瑙ｏ細鍋囪灞呮皯姣忔湀鐢12鍚ㄦ按鍒欐按璐逛负12A 浣嗗疄闄呮按璐逛负20A 鎵浠20A-12A=8A鐨勮秴鍑12鍚ㄦ按璐 瓒呭嚭12鍚姘存按璐规寜2A鍏冩瘡鍚ㄦ敹鍙 鎵浠ヨ秴鍑烘按涓8A/2A=4鍚ㄦ按 鎵浠 瀹為檯鐢ㄦ按涓12+4=16鍚ㄦ按
绛旓細鏌愬競涓轰簡榧撳姳灞呮皯鑺傜害鐢ㄦ按,瀵鏉ヨ嚜姘寸敤鎴峰涓嬭瀹,鑻ユ瘡鎴锋瘡鏈堢敤姘翠笉瓒呰繃10鍚ㄧ殑閮ㄥ垎锛屾寜2.40鍏/鍚ㄦ敹璐,瓒呰繃10鍚ㄤ笉瓒呰繃20鍚ㄩ儴鍒嗘寜4.00鍏/鍚ㄦ敹璐癸紝瓒呰繃20鍚ㄩ儴鍒嗘寜6.50鍏/鍚ㄦ敹璐.鐜板凡鐭ユ潕鑰佸笀瀹舵煇鏈堢即姘磋垂70.50鍏冿紝鍒欐潕鑰佸笀瀹舵湀鐢ㄦ按澶氬皯鍚紵鎬濊矾锛10鍚ㄥ唴10鍚ㄧ殑閮ㄥ垎锛屾寜2.40鍏/鍚紝鏁呰繖閮ㄥ垎鏈楂...
绛旓細16
绛旓細瑙ｏ細璁惧垯璇ュ眳姘戣繖涓湀瀹為檯鐢ㄦ按x鍚 鍒12a+(x-12)2a=20a x=16 绛旓細 璇ュ眳姘戣繖涓湀瀹為檯鐢ㄦ按16鍚
绛旓細x鍚 12*1.8+3.6(x-12)=50.4 21.6+3.6x-43.2=50.4 3.6x=72 x=20
绛旓細甯冨徑灏忓瓙锛屼綘濂斤細鏍囧噯鍐咃細12脳a锛12a 鏍囧噯澶栵細锛20a-12a锛壝2a锛4锛堝惃锛夎灞呮皯杩欎釜鏈鐢ㄦ按锛12锛4锛16锛堝惃锛=== 瑙ｏ細璁捐繖涓湀鐢ㄦ按X鍚 12a锛嬶紙X锛12锛壝2a锛20a 12a锛2aX锛24a锛20a 2aX锛32a X锛16
