You have a total of 21 pens and pencils on your desk. you have 3 more pens than pencils. write a system linear equations that represent this situation.

Step-by-step explanation:

Linear equation : An equation made by using two variables that represents  a straight line on a graph.

Let x be the variable that denotes the number of pens and y be the variable that denotes the number of pencils.

Given : You have a total of 21 pens and pencils on your desk.

i.e.                  (1)

You have 3 more pens than pencils.

i.e.                 (2)

Now , from (1) and (2) , we have

The  system of linear equations that represents the given situation :

- both graphs increase on their domain.

- the graphs of both functions have the same x-intercept.

- neither graph has a y-intercept.