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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.

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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

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