1/3x+1/5y=-7/15
1/3x-4y=67/3
Solve by substitution?
2012-12-19 4:10 pm
回答 (1)
2012-12-21 12:19 pm
✔ 最佳答案
yes1. 1/3x= -7/15-1/5y
2. 1/3x=67/3+4y
therefore
-7/15-1/5y=67/3+4y
-7/15=67/3+4y+1/5y
-7/15-67/3=4y+1/5y
-342/15=21/5y
y=-114/21
y=5and3/7
for x you calculate yourself
收錄日期: 2021-04-13 19:13:23
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20121219081041AAOsMnu