Question 406121
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Hi
8 fewer breast cancer stamps than the number of regular stamps
Let x and (x-8)represent the number of regular and bc stamps respectively
Question states***Note: CENTS makes sense
 37x + 40(x-8) = 1990
Solving for x
  77x = 2310
       x = 30, the number of regular and  22 breast cancer stamps  (30-8)

CHECKING our Answer***
  37*30 + 40*22 = 1990 or $19.90