8xâ3x=105
解ï¼ï¼8-3ï¼x=105ï¼å并å类项ï¼ç³»æ°ç¸åï¼æªç¥æ°ä¸åï¼
5x=105
5x÷5=105÷5ï¼çå¼ä¸¤è¾¹åæ¶é¤ä»¥ç¸ççéé¶çæ°æå¼å,两边ä¾ç¶ç¸çãï¼
x=21
解æï¼å å并å类项ï¼ç¶åæ ¹æ®çå¼çæ§è´¨ï¼å¨æ¹ç¨ä¸¤è¾¹åæ¶é¤ä»¥5å¾åºæ¹ç¨ç解ã
å并å类项就æ¯å©ç¨ä¹æ³åé å¾ï¼å类项çç³»æ°ç¸å ï¼æå¾çç»æä½ä¸ºç³»æ°ï¼åæ¯åææ°ä¸åãå并å类项å®é ä¸å°±æ¯ä¹æ³åé å¾çéåè¿ç¨ã
çå¼è§£æ¹ç¨çæ§è´¨ï¼
1ãçå¼ä¸¤è¾¹åæ¶å ä¸ç¸ççæ°æå¼åã两边ä¾ç¶ç¸çã
2ãçå¼ä¸¤è¾¹åæ¶ä¹ï¼æé¤ï¼ç¸ççéé¶çæ°æå¼åï¼ä¸¤è¾¹ä¾ç¶ç¸çã
3ãçå¼ä¸¤è¾¹åæ¶ä¹æ¹ï¼æå¼æ¹ï¼ï¼ä¸¤è¾¹ä¾ç¶ç¸çã