SOLUTION: How do you solve this proportions ? a+1 over 2 = a - 1 over 9 3 over b = b over 9 and 5 over x = x - 1 over 3

Hi

solving Proportions by cross multiplying

         |CROSS MULTIPLYING

      9(a+1) = 2(a-1) 

         7a = -11

          a = -11/7



     

      b^2 = 27

      b = ± sqrt(27)



  

    x(x-1) = 15

   x^2 -x - 15 = 0