Question

A triangle has sides with lengths of 2x-7, 5x-3, and 2x-2. what is the perimeter of the triangle

Answer 1

Perimeter of a triangle =sum of all sides
                                     =2x-7+5x-3+2x-2
                                     =2x+5x+2x-7-3-2
                                     =9x-12 

Answer 2

perimeter = 2x - 7 + 5x - 3 + 2x - 2
 = 9x - 12