小六數學:計算式
回答 (2)
2008-07-12 9:20 pm
A+B=18 (1式)
B+C=24 (2式)
2式-1式
C-A=6 C比A多6元
A+C=12
哪代表A=3 C=9 (3式)
代3式去第1或第2題
3+B=18
B=15
A+B+C=15+9+3
27
答案是27
B+C=24 (2式)
2式-1式
C-A=6 C比A多6元
A+C=12
哪代表A=3 C=9 (3式)
代3式去第1或第2題
3+B=18
B=15
A+B+C=15+9+3
27
答案是27
2008-07-12 8:31 pm
ans: $27
let A has $a, B has $, C has $c,
a b=18
b c=24
a c=12
(a b) (b c) (a c)=18 24 12
2*(a b c)=54
(a b c)=27
where a+ b+ c = the sum of money that A,B & C have
2008-07-12 12:32:25 補充：
a+ b=18
b +c=24
a +c=12
(a+ b)+ (b+ c)+ (a+ c)=18 24 12
2*(a+ b +c)=54
(a+ b +c)=27
2008-07-12 12:32:59 補充：
(a+ b)+ (b+ c)+ (a+ c)=18 +24+ 12
sorry
忘記打加號
let A has $a, B has $, C has $c,
a b=18
b c=24
a c=12
(a b) (b c) (a c)=18 24 12
2*(a b c)=54
(a b c)=27
where a+ b+ c = the sum of money that A,B & C have
2008-07-12 12:32:25 補充：
a+ b=18
b +c=24
a +c=12
(a+ b)+ (b+ c)+ (a+ c)=18 24 12
2*(a+ b +c)=54
(a+ b +c)=27
2008-07-12 12:32:59 補充：
(a+ b)+ (b+ c)+ (a+ c)=18 +24+ 12
sorry
忘記打加號
參考: me
收錄日期: 2021-04-24 10:46:06
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