Question 1069784
you are starting with:


(5a + 6) / (7a - 49).


and you wind up with:


x / (7b(a - 7)


only thing i can think of is this.


start with (5a + 6) / (7a - 49).


multiply by b/b to get:


b * (5a + 6) / (b * (7a - 49)


factor out a 7 in the denominator to get:


b * (5a + 6) / (b * 7 * (a - 7).


this can also be shown as:


b * (5a + 6) / (7b * (a - 7))


basically, what you are doing is multiplying the fraction by b/b and then factoring to get the final form.


? is going to be equal to b * (5a + 6).