Apples

Zuzana bought 3 kg Jonathan apples. Then she noticed that Golden apples were 3 CZK a kilogram cheaper. So they bought 2 kg. For apples, she paid a total of CZK 109. How much did 1 kg Jonathan and how much Golden?

Correct answer:

g =  20
j =  23

Step-by-step explanation:


3j + 2g = 109
g = j - 3

3•j + 2•g = 109
g = j - 3

2g+3j = 109
g-j = -3

g = 20
j = 23

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