###Human: Lyka wants to buy a smartphone worth $160 but she only has $40 at the moment. She plans to save an equal amount of money per week for two months for the remaining amount that she needs. How much should she save per week?, ### Assistant: Lyka has to save a total of $160 - $40 = $120 for two months.
There are 2 x 4 = 8 weeks in two months.
Hence, Lyka needs to save $120/8 = $15 per week. 
 So the answer is :  15