Carson and Emily make a poster for school. The poster is in the shape of a rectangle. The length of the poster measures 7 units, and the area of the poster is 42 square units. What is the width of the poster?

To find the width of the poster, we first need to find the formula for the area of a rectangle, which is:

Area = Length x Width

Given that the length is 7 units and the area is 42 square units, we can plug these values into the formula:

42 = 7 x Width

Now we can solve for the width by dividing both sides by 7:

Width = 42 / 7
Width = 6

Therefore, the width of the poster is 6 units.