5年級數學方程式

2007-05-17 2:57 am
94減某數的3倍即等於30加上某數的5倍,求某數
請教各位朋友多謝

回答 (13)

2007-05-17 3:00 am
✔ 最佳答案
that means:
94-3x=30+5x where x=某數
94-30=5x+3x
64=8x
x=8

so某數=8
Can i help you??
參考: Myself
2007-05-17 5:54 pm
94-3x=30=5x
5x+3x=94-30
8x=64
x=8
2007-05-17 3:13 am
94減某數的3倍即等於30加上某數的5倍,求某數
30+5x=94-3x
習慣將所有含x的數全都搬去左手邊,數字搬去右手邊,搬時要記緊變符號,如果是正,搬完後變負,如果是負,搬完後變正,即:5x+3x=94-30 8x=64 x=8 某數是8
參考: 我
2007-05-17 3:07 am
設某數為A。
94-3A=30+5A
94=30+5A+3A
94-30=8A
64=8A
A=8

某數=8

2007-05-16 19:08:31 補充:
設某數為A。94-3A=30 5A94=30 5A 3A94-30=8A64=8A64/8=AA=8某數=8
參考: me
2007-05-17 3:06 am
設某數是x
       94-3x=30+5x
94-30-3x=5x-30
64-3x+3x=5x+3x
64=8x
64除8=8x除8
x=8
2007-05-17 3:03 am
設某數為X,
94-3X=30+5X
5X+3X=94-30
8X=64
X=64/8
X=8

Ans:某數為8。
2007-05-17 3:02 am
係咪咁94- 3x +5x
-3x+5x=94
2x=94
94除2x
X= 47

2007-05-16 19:03:32 補充:
sor sorX= 8
2007-05-17 3:02 am
設某數為x

94-3x = 30+5x
94 = 30+5x+3x
94-30 = 8x
64 = 8x
x = 8

所以某數為8
2007-05-17 3:01 am
設某數為x

94 - 3x = 30 + 5x
94 - 30 = 5x + 3x
64 = 8x
x = 64 /8
x = 8

所以:某數為8
2007-05-17 3:01 am
94 - 3x = 30 + 5x
64 = 8x
x = 8
參考: 自己"


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