Question 425070
Solution:After multiply by -1 the nom. and denom. of (7x-5)/(9-x) we have:
         
         {{{((3-x)/(x-9))-((5-7x)/(x-9))}}}

         {{{((3-x)-(5-7x))/(x-9)}}}=

          {{{(3-x-5+7x)/(x-9)}}}=

            {{{(6x-2)/(x-9)}}}