Jendo's 83123

Jenda, Milan, and Tomáš have a total of 203 Pokemon cards. Jenda has twice as many cards as Tomáš, and Milan has a quarter of Jendo's number of cards.
a) How many cards does Jenda have?
b) How many fewer cards do Milan have than Jenda and Tomáš?

Correct answer:

j =  116
x =  145

Step-by-step explanation:

$$\begin{gathered} j+m+t=203 \\ j=2t \\ m=j/4=t/2 \\ j+j/4+j/2=203 \\ 7j=812 \\ j=\frac{812}{7}=116 \\ j=116 \end{gathered}$$

$$\begin{gathered} m=j/4=116/4=29 \\ t=j/2=116/2=58 \\ x=j+t-m=116+58-29=145 \end{gathered}$$

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