一题不会（急）

数学之门 · 发表于 2010-5-15 17:01:15

A除B除C=5
A除B减C=12
A减B=84
A=?
B=？
C=？

kuafuzhuiri · 发表于 2012-8-23 16:51:10

小盆友加油哦

韵馨。Narl · 发表于 2012-8-2 10:42:05

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\[\begin{array}{l}
\frac{a}{b} = 5c \\
\frac{a}{b} = 12 + c \\
5c = 12 + c \\
c = 3 \\
\frac{a}{b} = 15 \\
a - b = 84 \\
a = 15b \\
15b - b = 84 \\
b = 6 \\
a = 84 + b = 90 \\
end{array}\]

韵馨。Narl · 发表于 2012-8-1 21:59:03

B=6 A=90 C=

lovisashami · 发表于 2011-1-16 17:03:54

哈哈，楼上的那位说的好！！！

想要飞得更高 · 发表于 2011-1-3 20:56:22

有小学生喜欢逛论坛的么？

企鹅 · 发表于 2010-12-30 11:44:30

居然没有小学生来。。。

zyy · 发表于 2010-5-16 16:51:46

谢谢

数学之门 · 发表于 2010-5-16 12:27:01

2# zyy 完全正确！

zyy · 发表于 2010-5-16 10:19:22

由解方程可得B=6 A=90 C=3

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