解方程(求a的值)

👨🏻‍🏫 學術台數學

喵喵

2006-11-04 6:41 am

9/8-1=(2a-5)/2

回答 (4)

leona

2006-11-04 7:19 am

✔ 最佳答案

9/8 - 1 = (2a - 5) / 2
(1/8) = (2a - 5) / 2
2a - 5 = 2 x (1/8)
2a - 5 = 1 / 4
2a = 5 + 1/4
2a = 21 / 4
a = (21/4)/2
a = 21 / 8
a= 2又 5/8 (計數要約簡)

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angelhly227

2006-11-04 5:46 pm

9/8-1=(2a-5)/2
(9/8-1)(2)=2a-5
1/8(2)=2a-5
1/4=2a-5
1/4+5=2a
5/1/4=2a
a=2/5/8
a=2.625

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kinmoonli

2006-11-04 6:57 am

9/8-1=(2a-5)/2

-1/8=(2a-5)/2

2a-5=-1/16

a=(5-1/16)/2

a=79/32

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肥紀

2006-11-04 6:46 am

9/8 - 1 = (2a - 5) / 2
(1/8) = (2a - 5) / 2
2a - 5 = 2 * (1/8)
2a - 5 = 1 / 4
2a = 5 + (1/4)
2a = 21 / 4
a = (21/4)/2
a = 21 / 8

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