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Xiaoming's piggy bank contains 1 and 50 cents coins, totaling 54 plums, totaling 15 yuan. How many plums can I get for two coins?
Suppose there are x pieces of 50 cents, then there are 54-x pieces 1 cent.

0.5x+0. 1*(54-x)= 15

0.5x+0. 1 * 54-0. 1x = 15

0.5x-0. 1x = 15-0. 1 * 54

0.4x=9.6

x=9.6÷0.4

x=24

There are 54-24=30 1 dime.

I hope it helps you.

If you have any questions, you can ask them.

Thanks for adoption

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