How many calories are in each

Question

A Sugar Dud has 30 less than twice as many calories as a Krunchy Krum. If 5 Sugar Duds have the same number of calories as 8 Krunchy Krums, how many calories are in each?

Answer 1

A Sugar Dud has 30 less than twice as many calories as a Krunchy Krum

 

s = 2k - 30

 

If 5 Sugar Duds have the same number of calories as 8 Krunchy Krums

 

5s = 8k, s = 8k/5, k = 5s/8

 

s = 2k - 30

s = 2(5s/8) - 30

s = 10s/8  -  30

8s = 10s - 240

240 = 2s

s = 120

k = 75