代數題請敎?? 急!!

2007-06-03 7:53 pm

有條代數題想請大家幫下手:

a 和 b 共有140元, b 有的是 a 的60%, b 究竟有多少??
要求詳細列式及答案, thx!!!!

回答 (4)

2007-06-03 8:00 pm

✔ 最佳答案

b is
because a+b=140
ax60%=b

a+ax60%=140
160%a = 140
a = 87.5
b = 140-87.5= * 52.5 *

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2007-06-03 8:03 pm

Let a be a then b has 60% a

a+ b = 140
Substitute:

a + 60% a = 140
a= 87.5

b= 140-a
b= 52.5

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2007-06-03 7:59 pm

a+b=140
b=0.6a
SO...a+0.6a=140
1.6a=140
a=87.5

b=0.6乘87.5
b=52.5

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2007-06-03 7:59 pm

b 84(元)

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