Question

numerele x si y sunt invers proportionale cu 2 respectiv 7.aflati cele doua numere stiind x-y=15

Answer 1

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Answer 2

x - y = 15

2x = 7y = k

x = k/2

y = k/7

k/2 - k/7 = 15

7k - 2k = 210

5k = 210

k = 42

x = 42/2 = 21

y = 42/7 = 6