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20 5 cent coins 20x5=100=1 dollar
2 dollar coin.
1 dollar/5 cents = 100 c/5 c = 20
1 x 50 cent 10 x 1 cent 6 x 5 cent 1 x 10 cent
it's possible only if there are 20 cent coins only for that 7 dollars 1 dollar = 100 cents, 100 cents = 5 of 20 cent coins since you need 5 of 20 cent coins for a dollar, you do 7 times of it. 7 X 5 = 35. Therefore, you need 35 of 20 cent coins for 7 dollars. (or there are 35 of 20 cent coins in 7 dollars)