b/4 = 80b = 80*4b = 320
m80 = 539+21m80 = 560m = 560/80m = 7
450/(k-8) = 3450 = 3(k-8)450 = 3k - 243k = 474k = 474/3k = 158
83 - 29 = d*2754 = 27dd = 54/27d = 2
1600/c = 92 - 521600/c = 401600 = 40cc = 1600/40c = 40
b/4 = 80
b = 80*4
b = 320
m80 = 539+21
m80 = 560
m = 560/80
m = 7
450/(k-8) = 3
450 = 3(k-8)
450 = 3k - 24
3k = 474
k = 474/3
k = 158
83 - 29 = d*27
54 = 27d
d = 54/27
d = 2
1600/c = 92 - 52
1600/c = 40
1600 = 40c
c = 1600/40
c = 40