數學題 二元一次方程

2008-01-22 3:20 am
1.解以下聯合二元一次方程.
(x/2)+(y/3)=1
(5x+3y)/4=3

回答 (4)

2008-01-22 3:29 am
✔ 最佳答案
1. 解以下聯合二元一次方程.
x/2 + y/3 = 1
(5x+3y)/4 = 3
Sol:
x/2 + y/3 = 1
9x + 6y = 18 ....... ( 1 ) ( multiply 18 both sides )
(5x+3y)/4 = 3
10x + 6y = 24 ....... ( 2 ) ( multiply 8 both sides )
( 2 ) - ( 1 )
x = 6
9 * 6 + 6y = 18
6y = - 36
y = - 6
Ans: x = 6, y = - 6
Send me a letter if any steps you don’t understand.
參考: 數學小頭腦
2008-01-22 3:32 am
X=6 Y= -6
2008-01-22 3:31 am
1.(1.4/2)+(0.9/3)=1
2.(5x0.9+3x2.5)/4=3
參考: 自己計
2008-01-22 3:27 am
(5x乘4)+(3y乘4)=3
20x+12y=3
參考資料


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