2(a+1)+3a=17
要步驟架=]]]
thz
簡單的一元一次方程,help me plz^^”
2009-11-29 10:32 pm
回答 (5)
2009-11-30 1:28 am
✔ 最佳答案
2(a+1)+3a=172a+2x1+3a=17
5a+2=17
5a=17-2
5a=15
a=15/5
a = 3
2009-11-29 11:59 pm
2(a+1)+3a=17
2(1)+2a=17
2a=15
a=7.5
by ME!
2(1)+2a=17
2a=15
a=7.5
by ME!
2009-11-29 11:17 pm
2(a+1)+3a=17
2a+2+3a=17
5a+2=17
5a=15
a=3
2a+2+3a=17
5a+2=17
5a=15
a=3
2009-11-29 10:44 pm
2(a+1)+3a=17
2a+a+3a=17 <-- 先柝括號2(a+1) =2 x a + 2 x 1 = 2a+a
6a=17 <--移項
a=17/6,, 等如17除6
2009-11-29 16:11:47 補充：
2(a+1)+3a=17
2a+２+3a=17 <-- 先柝括號2(a+1) =2 x a + 2 x 1 = 2a+２
５a=15 <--移項
a=3,,
2a+a+3a=17 <-- 先柝括號2(a+1) =2 x a + 2 x 1 = 2a+a
6a=17 <--移項
a=17/6,, 等如17除6
2009-11-29 16:11:47 補充：
2(a+1)+3a=17
2a+２+3a=17 <-- 先柝括號2(a+1) =2 x a + 2 x 1 = 2a+２
５a=15 <--移項
a=3,,
2009-11-29 10:39 pm
2(a+1)+3a=17
2a+2+3a=17
5a=17-2
5a/5=15/5
a=3
唔知正唔正確>.<
2a+2+3a=17
5a=17-2
5a/5=15/5
a=3
唔知正唔正確>.<
收錄日期: 2021-04-13 16:57:42
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091129000051KK00824