Tony had a certain number of stamps that were each worth $0.15. he misplaced 7 stamps. he found that the total value of his stam
p collection was now $5.55.write an equation to represent the value of his stamp collection in terms of the number of stamps, s, that he had originally, and find the value of s.
-6 x 2 + 6 x 200. Since you want to find out 6 multiplied by 198 the easiest way (for me) would be to round it and then substract 12 since 200-198 is equal to 2 and 6 x 2 is equal to 12
