I have k quarters, five less quarters than nickels and one more than twice as many dimes as quarters. Find the value of the coins in cents in terms of k.
quarters --- k
nickels ----- k+5 , " five less quarters than nickels", so 5 more nickels"
dimes ---- 2k + 1
value of coins = 25k + 5(k+5) + 10(2k+1)
expand, then simplify