Question

Carla is saving money to buy a phone. The phone she will buy costs $1,000. She has already $200. Carla will save $20 each week. How many weeks will it take Carla to save enough money to buy the phone. (10 points)

Answer 1

She is asaving money to buy a phone worth $1000. She already has $200. She can only save $20 per week. The number of week it will take her to buy the phone can be calculated below

Let

x = number of weeks

`\begin{gathered} 1000=200+20x \\ 1000-200=20x \\ 800=20x \\ \text{divide both sides by 20} \\ x=(800)/(20) \\ x=40\text{ weeks} \end{gathered}`