equation
9(2a-1)=3[4(1+2a)-5]-8a+2
help! equation 15points
2014-11-05 4:27 am
回答 (2)
2014-11-05 4:42 am
✔ 最佳答案
9(2a - 1) = 3[ 4(1 + 2a) - 5 ] - 8a + 218a - 9 = 3( 4 + 8a - 5 ) - 8a + 2
18a - 9 = 3( 8a - 1 ) - 8a + 2
18a - 9 = 24a - 3 - 8a + 2
18a - 9 = 16a - 1
18a - 16a = 9 - 1
2a = 8
a = 4
2014-11-04 20:58:17 補充：
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2014-11-05 5:35 am
9(2a - 1) = 3[ 4(1 + 2a) - 5 ] - 8a + 2
18a - 9 = 3( 4 + 8a - 5 ) - 8a + 2
18a - 9 = 3( 8a - 1 ) - 8a + 2
18a - 9 = 24a - 3 - 8a + 2
18a - 9 = 16a - 1
18a - 16a = 9 - 1
2a = 8
a = 4
18a - 9 = 3( 4 + 8a - 5 ) - 8a + 2
18a - 9 = 3( 8a - 1 ) - 8a + 2
18a - 9 = 24a - 3 - 8a + 2
18a - 9 = 16a - 1
18a - 16a = 9 - 1
2a = 8
a = 4
參考: ME
收錄日期: 2021-04-15 17:07:29
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https://hk.answers.yahoo.com/question/index?qid=20141104000051KK00109