自来水公司规定:“每人每月用水不超过2吨时,按每吨1.8元收费,超过2吨的部分按每吨5元收费.”照这样计 自来水公司规定 每人每月用水不超过2吨时 按每吨0.8元收费...
\u5c0f\u5b66\u6570\u5b66\u9898\uff0c\u81ea\u6765\u6c34\u516c\u53f8\u89c4\u5b9a\uff0c\u6bcf\u4eba\u6bcf\u6708\u7528\u6c34\u4e0d\u8d85\u8fc72\u5428\uff0c\uff08\u5305\u62ec2\u5428\uff09\u65f6\uff0c\u6309\u6bcf\u54282.8\u5143\u6536\u8d39\uff0c\u8d85\u8fc72\u5428\u7684\u90e82x2.8+\uff088.4-2\uff09x5
=5.6+6.4x5
=5.6+32
=37.6
\u7b54\uff1a\u738b\u53d4\u53d4\u5171\u7528\u6c348.4\u5428\uff0c\u5e94\u4ea437.6\u5143\u6c34\u8d39\u3002
\u5e94\u8be5\u4ea42 x 0.8+(8.4 - 2) x 5=33.6
1.8×2+(8.4-2)×5=3.6+6.4×5,
=3.6+32,
=35.6(元).
答:应缴水费35.6元.
2×3=6(吨),
0.8×6+5×(8.5-6),
=4.8+12.5,
=17.3(元);
答:应交水费17.3元.
绛旓細2脳3=6锛堝惃锛夛紝0.8脳6+5脳锛8.5-6锛夛紝=4.8+12.5锛=17.3锛堝厓锛夛紱绛旓細搴斾氦姘磋垂17.3鍏冿紟
绛旓細1.8脳2+锛8.4-2锛壝5=3.6+6.4脳5锛=3.6+32锛=35.6锛堝厓锛夛紟绛旓細搴旂即姘磋垂35.6鍏冿紟
绛旓細璁鐢ㄦ按x鍚紝鍒欐湁锛3脳1.8+5脳锛坸-3锛=37.2锛5.4+5x-15=37.2;5x=47.1;x=9.42;鎵浠ョ敤姘9.42鍚 鎮ㄥソ锛屽緢楂樺叴涓烘偍瑙g瓟锛宻kyhunter002涓烘偍绛旂枒瑙f儜 濡傛灉鏈鏈変粈涔堜笉鏄庣櫧鍙互杩介棶锛屽鏋滄弧鎰忚寰楅噰绾 濡傛灉鏈夊叾浠栭棶棰樿閲囩撼鏈鍚庡彟鍙戠偣鍑诲悜鎴戞眰鍔╋紝绛旈涓嶆槗锛岃璋呰В锛岃阿璋傜瀛︿範杩涙 ...
绛旓細锛25-3脳5锛壝5+3脳5脳1.6=10脳5+24=74锛堝厓锛夌瓟锛氬簲浜ゆ按璐74鍏冿紟
绛旓細瑙o細搴旂即姘磋垂锛1.8*6+锛8.4-6锛*5 =10.8+12 =22.8鍏 銆
绛旓細2x2.8+锛8.4-2锛墄5 =5.6+6.4x5 =5.6+32 =37.6 绛旓細鐜嬪彅鍙斿叡鐢ㄦ按8.4鍚紝搴斾氦37.6鍏冩按璐广
绛旓細2x3x3+锛10-2x3锛墄4=34鍏 绛旓細搴斾氦姘磋垂34鍏
绛旓細3浜姣忎汉2鍚ㄦ槸3*2*0.8=4.8鍏 瓒呭嚭閮ㄥ垎8.4-3*2=2.4鍚 2.4*5=12鍏 鍚堣:4.8+12=16.8鍏
绛旓細y=2.60脳5+3.2锛坸-5锛
绛旓細锛堜竴锛12锛4锛8锛4脳2.9锛11.6锛堝厓锛 锛岃秴鍑洪儴鍒 8脳5锛40锛堝厓锛夛紝11.6鍔40寰51.6鍏冦 锛堜簩锛夊悓鐞嗭紙涓夛級56鍑11.6寰44.4鍏冿紝44.4闄や互5寰8.88,8.88鍔犱笂4寰12.88