Question

Alex opened a new savings account and she planned to save $550 each month. She was, however, able to save more each month than she had originally planned. In fact, after 12 months (without considering interest) Alex's savings account will be three months short of twice the amount she originally thought she would save in twelve months. How much did Alex actually save each month?

Answer 1

let m=550
s=actual savings
x=actual amount per month ( we want this value)
now s=19m from the 3 months short
but s=12x
so x=19m/12 = 870.3333333