Together 32831

Aleš has one coin, Boris and Cyril each have two coins.

Aleš has 5 Sk more than Boris and 5 Sk less than Cyril. Note Czech coins are 1, 2, 5, 10, 20, 50 Sk.

Aleš has ___ Sk.

Boris has ___ Sk and ___ Sk.

Cyril has ___ Sk and ___ Sk.

Together, they have ___ Sk.

Correct answer:

a =  20
b =  15
c =  25
s =  60

Step-by-step explanation:

$$\begin{gathered} a=5+b \\ a=c-5 \\ b=b_1+b_2 \\ c=c_1+c_2 \\ a=20 \end{gathered}$$

$$\begin{gathered} b=a-5=20-5=15 \\ b=5+10 \end{gathered}$$

$$\begin{gathered} c=a+5=20+5=25 \\ c=20+5 \end{gathered}$$

$s=a+b+c=20+15+25=60$

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