1.a和b共有80元,a比b多12元,問b有多少元?
2.甲,乙兩數的和是64,甲系乙的3倍,問乙數是多少?
請列式說明~~~~~~~~~~
easy方程一問
2008-05-18 12:39 am
回答 (7)
2008-05-18 12:51 am
✔ 最佳答案
2B+12=802B+12=80
__ __
2 2
B+12-12=80-12
B=68
設乙是Ｂ
3B+B=64
4B=64
__ __
4 4
B=18
參考: 小六的我
2008-05-18 8:32 pm
1. let b has x dollar, a has (x+12) dollar
x + (x+12) = 80
2x + 12 = 80
2x = 80 - 12
2x = 68
x = 34
b has $34.
2. let 乙 be y, 甲 be 3y
y + 3y = 64
4y = 64
y = 16
乙數是 16.
x + (x+12) = 80
2x + 12 = 80
2x = 80 - 12
2x = 68
x = 34
b has $34.
2. let 乙 be y, 甲 be 3y
y + 3y = 64
4y = 64
y = 16
乙數是 16.
2008-05-18 6:53 pm
(易，用於小學)
1.a和b共有80元,a比b多12元,問b有多少元?
(中)
設b有x元
x+x+12=80
x+x =68
2x=68
x=34
b有34元
(英)
let b has x dollar, a has (x+12) dollar
x + (x+12) = 80
2x + 12 = 80
2x = 80 - 12
2x = 68
x = 34
therefore, b has $34.
2.甲,乙兩數的和是64,甲系乙的3倍,問乙數是多少?
(中)
設乙數是y
3y+y=64
4y=64
y=16
乙數是16
(英)
2. let 乙 be y, 甲 be 3y
y + 3y = 64
4y = 64
y = 16
therefore, 乙數是 16.
(難，可用於中學/小學六和五年級)
1.a和b共有80元,a比b多12元,問b有多少元?
a+b=80
a-b=12
a+b+a-b=92
2a=92
2a/2=92/2
a=46
b=34
therefore, b has $34.
2.甲,乙兩數的和是64,甲系乙的3倍,問乙數是多少?
甲為a，乙為b。
a+b=64
a=3b
3b+b=64
4b=64
4b/4=64/4
b=16
a=48
therefore, b is 16.
1.a和b共有80元,a比b多12元,問b有多少元?
(中)
設b有x元
x+x+12=80
x+x =68
2x=68
x=34
b有34元
(英)
let b has x dollar, a has (x+12) dollar
x + (x+12) = 80
2x + 12 = 80
2x = 80 - 12
2x = 68
x = 34
therefore, b has $34.
2.甲,乙兩數的和是64,甲系乙的3倍,問乙數是多少?
(中)
設乙數是y
3y+y=64
4y=64
y=16
乙數是16
(英)
2. let 乙 be y, 甲 be 3y
y + 3y = 64
4y = 64
y = 16
therefore, 乙數是 16.
(難，可用於中學/小學六和五年級)
1.a和b共有80元,a比b多12元,問b有多少元?
a+b=80
a-b=12
a+b+a-b=92
2a=92
2a/2=92/2
a=46
b=34
therefore, b has $34.
2.甲,乙兩數的和是64,甲系乙的3倍,問乙數是多少?
甲為a，乙為b。
a+b=64
a=3b
3b+b=64
4b=64
4b/4=64/4
b=16
a=48
therefore, b is 16.
2008-05-18 2:14 am
1.a和b共有80元,a比b多12元,問b有多少元?
a+b=80
a-b=12
a+b+a-b=92
2a=92
2a/2=92/2
a=46
b=34
2.甲,乙兩數的和是64,甲系乙的3倍,問乙數是多少?
甲為a，乙為b。
a+b=64
a=3b
3b+b=64
4b=64
4b/4=64/4
b=16
a=48
a+b=80
a-b=12
a+b+a-b=92
2a=92
2a/2=92/2
a=46
b=34
2.甲,乙兩數的和是64,甲系乙的3倍,問乙數是多少?
甲為a，乙為b。
a+b=64
a=3b
3b+b=64
4b=64
4b/4=64/4
b=16
a=48
2008-05-18 1:53 am
1. a+b=80--------(1)
a-b=12--------(2)
(1)-(2)
80-12 = a+b-a+b
68 = 2b
b = 34
2. 甲+乙=64--------(1)
甲=3乙-------(2)
代(2)入(1)
3乙+乙 = 64
乙 = 16
a-b=12--------(2)
(1)-(2)
80-12 = a+b-a+b
68 = 2b
b = 34
2. 甲+乙=64--------(1)
甲=3乙-------(2)
代(2)入(1)
3乙+乙 = 64
乙 = 16
參考: me & truth
2008-05-18 12:51 am
1.a和b共有80元,a比b多12元,問b有多少元?
設b有x元
x+x+12=80
x+x =68
2x=68
x=34
b有34元
2.甲,乙兩數的和是64,甲系乙的3倍,問乙數是多少?
設乙數是y
3y+y=64
4y=64
y=16
乙數是16
設b有x元
x+x+12=80
x+x =68
2x=68
x=34
b有34元
2.甲,乙兩數的和是64,甲系乙的3倍,問乙數是多少?
設乙數是y
3y+y=64
4y=64
y=16
乙數是16
2008-05-18 12:47 am
1. let b has x dollar, a has (x+12) dollar
x + (x+12) = 80
2x + 12 = 80
2x = 80 - 12
2x = 68
x = 34
therefore, b has $34.
2. let 乙 be y, 甲 be 3y
y + 3y = 64
4y = 64
y = 16
therefore, 乙數是 16.
x + (x+12) = 80
2x + 12 = 80
2x = 80 - 12
2x = 68
x = 34
therefore, b has $34.
2. let 乙 be y, 甲 be 3y
y + 3y = 64
4y = 64
y = 16
therefore, 乙數是 16.
參考: myself.
收錄日期: 2021-04-26 17:25:47
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