3題數學題/.....

1)-1
2)6
3)8/21

Q.1

y + 2 / 4 – 2 y – 3 / 6 = 1
y + 1 / 2 – 2 y – 1 / 2 = 1
y – 2 y = 1
- y = 1
y = - 1

Q.2

t / 2 - t = - 3
- t / 2 = - 3
- t = -3 * 2
- t = -6
t = 6

Q.3

m – 3 / 4 = m – 6 ?

The equation of left-handed side is NOT EQUAL to right-handed side! Therefore, the equation is INCORRECT!

3.

解﹕m-3/4=m-6
m+m = 3/4-6
2m=3/4-24/4
2m=-21/4
2m=-5.25
m=2.625

2.
解﹕ t/2-t=3


3.
解﹕ y+2/4-2y-63=1
y -2y=1-2/4+63
y -2y=2/2-1/2+126/2
-y=2-1+126/2
-y=127/2
-y=63.5或127/2

2006-12-10 20:44:53 補充：
1)y+2/4 - 2y-3/6 = 1y+1/2 - 2y -1/2 =1y - 2y =1-y = 1y = -12)t/2 -t = -3-t/2 = -3t = 63)m-3/4 = m-6 2m= 3/4 - 6m= 3/8 - 3m= -21/8 看錯提.........

2006-12-10 20:44:54 補充：
1)y+2/4 - 2y-3/6 = 1y+1/2 - 2y -1/2 =1y - 2y =1-y = 1y = -12)t/2 -t = -3-t/2 = -3t = 63)m-3/4 = m-6 2m= 3/4 - 6m= 3/8 - 3m= -21/8 看錯提.........