CZK coins

Thaddeus and Joanna together have 15 CZK. Joanna has half of Thaddeus' money. Nevertheless, Joanna has three coins and Thaddeus 2 coins. Which coin has Thaddeus and Joanna (Help: CZK coins have values 1,2,5,10,20,50 CZK)?

Final Answer:

t =  10 Kč
j =  5 Kč

Step-by-step explanation:

$$\begin{gathered} t+j=15 \\ j=t/2 \\ t+t/2=15 \\ 3t=30 \\ t=\frac{30}{3}=10 \\ t=10 \\ t=5+5=10\text{Kc} \end{gathered}$$

$j=2+2+1=5\text{Kc}$

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