Dog price

Tereza agreed to get a dog and 6000 crowns a year for help in a dachshund breeding station. After eight months she had to finish work and got a dog and 2000 crowns. What price does a dog have?

Correct result:

s =  6000


12m = 6000 + s
8m = 2000 + s

12•m = 6000 + s
8•m = 2000 + s

12m-s = 6000
8m-s = 2000

m = 1000
s = 6000

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