1) 2/7x - 9 = 21
2) 10x+3/8 = 1/5/8
3) 3/7Y+0.2 = 1/2
注意：要有詳細ge計算過程!!!thx!!!
更新1:
1/2 1 = 分子 2 = 分母 / = 分線
更新2:
個個都好好呀xddd" 唔該晒你地!!!
小六數學 - 方程!!!
2008-04-24 3:09 am
幫我計一計呢３題數!!!
1) 2/7x - 9 = 21
2) 10x+3/8 = 1/5/8
3) 3/7Y+0.2 = 1/2
注意：要有詳細ge計算過程!!!thx!!!
1) 2/7x - 9 = 21
2) 10x+3/8 = 1/5/8
3) 3/7Y+0.2 = 1/2
注意：要有詳細ge計算過程!!!thx!!!
回答 (3)
2008-04-25 1:15 am
1) 2/7x - 9 = 21
2/7x-9+9=21+9 2/7x=30 x=30x7/2 x=105
2) 10x+3/8 = 1/5/8
10x+3/8-3/8=13/8-3/8 10x=5/4 x=1/8
3) 3/7Y+0.2 = 1/2
3/7y+0.2-0.2=0.5-0.2 3/7y=0.3 y=0.3x7/3=0.7
2/7x-9+9=21+9 2/7x=30 x=30x7/2 x=105
2) 10x+3/8 = 1/5/8
10x+3/8-3/8=13/8-3/8 10x=5/4 x=1/8
3) 3/7Y+0.2 = 1/2
3/7y+0.2-0.2=0.5-0.2 3/7y=0.3 y=0.3x7/3=0.7
2008-04-24 4:25 pm
1) 2/7x - 9 = 21
2/7 x = 21 + 9
2/7 x = 30
x = 30 x 7/2
x =105
2) 10x+3/8 = 1/5/8
10x = 13/8-3/8
10x = 10/8
x = 10/8 x 1/10
x =1/8
3) 3/7Y+0.2 = 1/2
3/7y = 1/2 - 0.2
3/7y = 1/2 - 2/10
3/7y = 5/10 - 2/10
y = 3/10 x 7/3
y = 7/10
2/7 x = 21 + 9
2/7 x = 30
x = 30 x 7/2
x =105
2) 10x+3/8 = 1/5/8
10x = 13/8-3/8
10x = 10/8
x = 10/8 x 1/10
x =1/8
3) 3/7Y+0.2 = 1/2
3/7y = 1/2 - 0.2
3/7y = 1/2 - 2/10
3/7y = 5/10 - 2/10
y = 3/10 x 7/3
y = 7/10
2008-04-24 3:14 am
1) 2/7 X - 9 = 21
2/7 X = 30
X = 105
2) 10X + 3/8 = 1/5/8 (我估係1又5/8)
10X = 13/8 -3/8
10X = 10/8
X = 1/8
3) 3/7 Y + 0.2 = 1/2
3/7 Y = 1/2 - 1/5
3/7 Y = (5-2)/10
Y = 3/10 X 7/3
= 7/10
2/7 X = 30
X = 105
2) 10X + 3/8 = 1/5/8 (我估係1又5/8)
10X = 13/8 -3/8
10X = 10/8
X = 1/8
3) 3/7 Y + 0.2 = 1/2
3/7 Y = 1/2 - 1/5
3/7 Y = (5-2)/10
Y = 3/10 X 7/3
= 7/10
參考: 自己計
收錄日期: 2021-04-25 13:38:47
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080423000051KK01998