Given:
basic pay = 9.25 per hour (This is the fixed rate)
additional pay = 0.15 per hour after each month of work (This is the variable rate)
at least twice her starting wage:
9.25 x 2 = 18.50
Let x be the number of months.
9.25 + 0.15x = 18.50
0.15x = 18.50 - 9.25
0.15x = 9.25
0.15x / 0.15 = 9.25 / 0.15
x = 61.66 or 62 months.
It would take 62 months or more than 5 years before Janice will earn twice her starting wage.
