1.3x-y=-12
3y-2x=22
x=-2 ed係答案 我要步驟
y=6 ed係答案 我要步驟
2.3x+5y=75
x/2-y=-4
x=10 ed係答案 我要步驟
y=9 ed係答案 我要步驟
elimination!!!!!!!!!!!!!!!!!!!
問有關elimination的問題~
2007-02-13 4:35 am
回答 (1)
2007-02-13 5:04 am
✔ 最佳答案
(1)3x-y=-12---(1)
3y-2x=22---(2)
(1)x3+(2):7x=-14
x=-2---(3)
Sub (3) into (1)
3(-2)-y=-12
-6-t=-12
y=6
Therefore x=-2,y=6
(2)
3x+5y=75---(1)
x/2-y=-4---(2)
(1)-(2)x6:11y=99
y=9---(3)
Sub (3) into (1):
3x+5(9)=75
3x=30
x=10
Therefore x=10,y=9
收錄日期: 2021-04-23 00:08:49
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070212000051KK04070