2(y - 3) + 2y - 9 = 47
2y + 2y = 62
4y = 62
y = 15.5
2(y - 3) + 2y - 9 = 47 點計 ---- > 2y + 2y = 62
Mathematics
2009-03-29 12:22 am
回答 (1)
2009-03-29 12:52 am
✔ 最佳答案
2(y-3)+2y-9=47把2乘入去(y-3)即2乘y,2乘-3
=2y-6
2y-6+2y-9=47
-6-9=-15
把-15移過去(即主項轉換)去左+15
2y+2y=47+15
2y+2y=62
4y=62
y=15.5
收錄日期: 2021-04-19 14:04:19
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090328000051KK01114