5.解ï¼è®¾å½©è²ç²ç¬æXç
4x+x=60
(4+1)x=60
5x=60
5x/5=60/5
X=12
12*4=48(çï¼
çï¼ç½ç²ç¬æ48çï¼å½©è²ç²ç¬æ12çã
6.解ï¼è®¾é¤æ°æ¯X
8x+9=208-8-9-x
8x+x=180
9x=180
9x/9=180/9
X=20
çï¼é£ä¹é¤æ°æ¯20ã
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