Answer: 6x+28
Explanation:
The perimeter of the triangle is the distance around the triangle.
We need to apply our ability to convert word problems in to mathematical expressions.
we were told that the bottom of the triangle is
units.
From the diagram perimeter
The length of the bottom of the triangle is

14 more than 4 times the bottom will be

14 more than the bottom of the triangle will be

So,

