我想問數學問題架...10點

3/1... 是三分之一吧
如是
1/3 才是正確打法喔~"~

1. 1/3 = 5f/9
3 = 5f
f = 3/5 -------------- 0.6

2. 1 = 1/2 + g/3 ----------------- 1 = 0.5 + g/3
1/2 = g/3 --------------------- 0.5 = g/3
g = 3/2 ------------------------ g = 1.5

3. x + ( 1/2 )x = 3 ---------------- x + 0.5x = 3
( 3/2 )x = 3 --------------------- 1.5x = 3
x = 2

1. 1/3=5f/9
1/3x9/5=f
3/5=f
(為什麼是=2)

2. 1=1/2+g/3
3(1)=3/2+g
2(3)=3+2g
6-3=2g
g=3/2

3. x+1/2x=3
3/2 x=3
x=3(2/3)
x=2

1. 3/1=9/5f
3 = 9/5f
3(5f) = 9
15f = 9
f = 9/15
∴ f = 3/5

2. 1=2/1+3/g
1= 2 + 3g
1-2 = 3g
-1 = 3g
∴ g = -1/3

3. x+2/1x=3
x+2 = 3(1x)
x+2 = 3x
x-3x = -2
-2x = -2
∴ x = 1

看看能不能幫你?