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m / 2 + m / 7 = 9 (全式乘 14)
7m + 2m = 126
9m = 126
m = 9




2006-10-17 21:11:22 補充：
更正答案9m = 126m = 126 / 9m = 14

2分之m+7分之m=9
14分之7m+14分之2m=9
14分之9m=9
9m=116
m=14

An easy one:)

m/2 + m/7 = 9
7m/14 + 2m/14 = 9
7m + 2m /14 = 9
9m / 14 = 9
9m = 9 x 14
9m = 126
m = 126/9
So, m = 14


Check it!

14/2 + 14/7 = 9
7 + 2 = 9

2分之m+7分之m=9

14分之7m + 14份之2m = 9

14分之9m = 9

14 = 9m分之9

m = 14

m/2+m/7=9

7m/14+2m/14=9

9m/14=9

9m=9(14)

m=14

將2同7同分母，變做14分之7m同14分之2m，最後調黎調去，答案:m=14

m/2+m/7=9
7m/14+2m/14=9
9m/14=9
9m=9(14)
m=14

14*2+14*7=9


m=14ar

m/2 + m/7 = 9
7m/14 + 2m/14 =9
9m/14=9
9m=126
m=14

m/2+m/7=9
(7m+2m)/14=9 ----通分母
9m=9x14
9m=126
m=126/9
m=14