If the sides of a triangle are −2x+3, 9x, and −2(3x−2), what is the perimeter?
The perimeter of a triangle is the sum of all three sides of the triangle.
Add all the side lengths.
(−2x+3)+(9x)+[−2(3x−2)]
−2x+3+9x−6x+4
Combine like-terms.
The answer is: x+7