Kendra has been saving for a stereo she has 105 saved and plans to save $20 per month until she can buy the stereo if the studio cause 345 how many more months will kendra need to save so she can buy the stereo

First you need to subtract the amount she already has, 105, from the amount she needs, 345, to get 240. Then you know she saves 20/month so you divide 240 by 20 to get 12. If she saves 20/month it will take her 12 months to have enough to buy the stereo. Hope this helps!