Tina is saving to buy a notebook computer. she has two options. the first option is to put $400 away initially and save $20 every month. the second option is to put $100 away initially and save $40 every month. after how many months would tina save the same amount using either option? how much would she save with either option?

The first option is to put $400 away initially and save $20 every month. Let she saves for x months. Equation becomes;

The second option is to put $100 away initially and save $40 every month.  Let she saves for x months. Equation becomes;

Equating both as equal we will get the number of months.

=>

=>

x = 15

Hence, it will take 15 months to save the same amount.

And amount saved will be =

= $700