Question

The school store has 2000 pencils in stock and sells an average of 50 pencils per day. The manager reorders when the the number of pencils in stock is 950 let d= the number of days

Answer 1

we make a equation depending of the days

`T=2000-50d`

Where T is the total of pencils

In this equation we are going to subtract 50 pencils for each day from the original 2000

to know the days where are 950 pencils we replace the total by 950 and solve d

`\begin{gathered} 950=2000-50d \\ 50d=2000-950 \\ 50d=1050 \\ d=(1050)/(50) \\ \\ d=21 \end{gathered}`

the number of days is 21