Mr. Fish

Mr. Fish paid 1,080 CZK for three Christmas carp.
The difference in weight between the first and second carp, and between the second and third carp, was exactly 80 dag in each case. The price of 1 kg of live carp was 120 CZK.
a) Calculate the weight of each carp in kilograms.
b) Calculate the total weight of all three carp in kilograms.

Final Answer:

m =  9 kg
a =  2.2 kg
b =  3 kg
c =  3.8 kg

Step-by-step explanation:

$$\begin{gathered} 1080=m\cdot 120 \\ 120m=1080 \\ m=\frac{1080}{120}=9 \\ m=9=9\text{kg} \end{gathered}$$

$$\begin{gathered} b=m/3=9/3=3 \\ a=b-0.8=3-0.8=2.2\text{kg} \end{gathered}$$

$c=b+0.8=3+0.8=3.8\text{kg}$

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