Andrew M. answered • 04/06/18

Tutor

New to Wyzant
Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors

x = 1st number

4x = 2nd number

4x - 12 = 3rd number

x + 4x + 4x - 12 = 123

9x - 12 = 123

9x = 135

x = 15

4x = 60

4x - 12 = 48

The 2nd number is 60