24/4: 24-12: 12+0: 12/1: 48/4: 72/6:
She distributed the 4 to the 2x-1, giving her 9+ 8x -4. she subtracted 8x from both sides leaving her with 4=9-4 which is the same as 4=5
the correct answer is 40 is under hours of training and 1400 is under monthly pay
1a+-1+a I believe that would be the answer