Hi
I. Assigning the variable
Let n represent the number subtacted from mumerator and denominator
II.Writing as we Read***
III.Solving for x by cross multiplying in this case
5(37-n) = 7(29-n)
2n = 7*29 - 5*37
2n = 18
n = 9, the number subtacted from mumerator and denominator
IV. CHECKING Our Answer***
20/28 = 5/7