Question 535805
Let x represent the number of 2-cent coins.
Therefore, 50 - x = number of 5-cent coins.

Value of bank in cents is 2x + 5(50 - x) = 187 (notice every value is in cents) solve for x.

-3x + 250 = 187
-3x = 187 - 250 = -63
x = -63/-3 = 21

There are 21 2-cent coins and 29 5-cent coins.