maths

n-m=12a -------(1)

m=0.05n --------(2)

a/4=24 ---------(3)

From (3): a = 96
sub a=96 into (1):
n-m = 1152 -----(4)
sub(2) into (4):
n-0.05n = 1152
0.95n = 1152
n = 1212.63
from (2): m =0.05n =0.05(1212.63)=60.63

first: a=24x4=96

second: n-0.05n=12(96)
0.95n=1152
n=23040/19

third : m=0.05(23040/19)=1152/19

n-m=12a

m=0.05n

a/4=24


n-0.05n=12a a/4=24
0.95n=12a a=24X4
0.95n=12X96 a=96
0.95n=1152
n=1212.631578947
n=1212.63

a/4 = 24
a = 96

m = 0.05n
n = 20m

n - m = 12a
20m - m = 12(96)
21m = 1152
m = 54.86

n = 20 (54.86)
n = 1097.2

2007-12-14 23:34:57 補充：
中間計錯了, 應該是:n - m = 12a20m - m = 12(96)19m = 1152m = 60.63n = 20 (60.63)n = 1212.6

n-m=12(96)
n-m=1152
n=1152+m
n=1152+0.05n

係咪真係計到 ga ?