The store sold 7 laptops in last week.
Explanation
Suppose, the number of laptops the store sold in last week is [tex]x[/tex]
As each laptop cost $ 1,555 , so the total cost of [tex]x[/tex] number of laptops will be: [tex]1555x[/tex] dollar.
Given that, the store sold laptops worth a total of $ 10,885 in the last week. So the equation will be.....
[tex]1555x= 10885\\ \\ x=\frac{10885}{1555}=7[/tex]
So, the store sold 7 laptops in last week.