math
posted by Natatlie on .
A child's coin bank contains $2.58 in pennies and nickels. If the number of pennies is 36 less than 2 times the number of nickels, how many pennies are in the bank?
A) 38 pennies
B) 42 pennies
C) 48 pennies
D) 2 pennies

let the number of nickels be x
then the number of pennies is (2x  36)
5x + 2x36 = 258
7x = 294
x = 42
so 42 nickels and 48 pennies
check: 42(5) = 48 = 258