好難4題簡易方程!要有式,最好有埋驗算

2008-01-31 4:42 am
1.)6(a - 6) = 48
=?

2.) 1又5分之3 a - 2又10分之9 =3分之2
=?

3.)p( 1 - 9分之4)= 30
=?

4.)k(1+20%)=4.8
=?

回答 (3)

2008-01-31 4:55 am
✔ 最佳答案
1) 6(a-6)=48
=> (a-6)=48/6
=> (a-6)=8
=> a=8+6
=>a=14

4) k(1+20%)=4.8
=> k(1+20/100)=48/10
=> k(120/100)=48/10
=> 120k*10=48*100
=> 1200k=4800
=> 12k=48
=> k=4

另外两條,乜分乜,好難睇
2008-01-31 5:03 am
6(a-6)=48
6a-6x6=48
6a-36=48
6a-36+36=48
6a=84
6a除6=84除6
a=14


1又5分之3 a - 2又10分之9 =3分之2
1又5分之3 a - 2又10分之9+2又10分之9 =3分之2+2又10分之9
1又5分之3 a=3又30分之17
1又5分之3 a除1又5分之3=3又30分之17除1又5分之3
a=2又48分之11


do by youself!!!!!
參考: me
2008-01-31 4:49 am
1.a=14


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