Question

Si p+q=300 y p/q=7/3, hallar p-q.

Answer 1

p / q = 7 / 3

p = 7K

q = 3K

* p + q = 300

7K + 3K = 300

   10K = 300

       K = 30

p - q = 7K - 3K

              4K = 4(30) = 120