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(5/4)t - 3 = (3/4)t
(5/4)t - (3/4)t = 3
(2/4)t = 3
(1/2)t = 3
t = 6


k/4 + 7/12 = k/6 + 1
k/4 - k/6 = 1 - 7/12
(k/4)*12 - (k/6)*12 = (1)*12 - (7/12)*12
3k - 2k = 12 - 7
k = 5


(3x + 2) /5 = (8x - 3) /6
[ (3x + 2) /5 ]*30 = [(8x - 3) /6 ]*30
6(3x+ 2) = 5(8x - 3)
18x + 12 = 40x - 15
40x - 18x = 12 + 15
22x = 27
x = 27/22


(6y-4) /4 = y+2
[ (6y-4) /4 ]*4 = ( y + 2 )*4
6y - 4 = 4y + 8
6y - 4y = 8 + 4
2y = 12
y = 6




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1,
5/4t-3=3/4t
5t/4-3=3t/4
5t/4-3t/4=3
2t/4=3 (約簡) t/2=3
t/2=3
t=6


2.
k/4+7/12=k/6+1
k/4-k/6=1-7/12
3k/12-2k/12=5/12
k/12=5/12
k=5


3
3x+2/5=8x-3/6
2/5+3/6=8x-3x
12/30+15/30=5x
27/30=5x
27/30 *1/5=x
x=27/150
x=3/10

4
6y-4/4=y+2
6y-1=y+2
6y=y+3
5y=3
y=3/5

5/4t-3= 3/4t (全部*4t)
5-12t = 3
t = 1/6

k/4+7/12= k/6+1 (全部*12)
3k+7 =2k+12
k=5

3x+2/5 =8x-3/6 (全部*30)
90x+12 =240x-15
150x =27
x =0.18

6y-4/4=y+2 (全部*4)
24y-4 =4y+8
20y=12
y=3/5