Question 1069805
(5a+6)/(7a-49)=N/(7b(a-7))


{{{(5a+6)/(7a-49)=N/(7b(a-7))}}}



Look at the two denominators.
Left has  7(a-7)
and
Right has 7b(a-7).


The common denominator for these two denominators would be  7b(a-7); so you can do this:


Start on just the Left member:
{{{((5a+6)/(7(a-7)))(b/b)}}}