Question

Given that the perimeter of the equilateral triangle is 21, solve for x. Round your answer to the nearest Whole number

Answer 1

The perimeter is the sum of the lengths of the sides. Since the triangle is equilateral, all sides are the same length.

... 3(2x -3) = 21

... 6x -9 = 21 . . . . simplify

... 6x = 30 . . . . . .add 9

... x = 5 . . . . . . . divide by 6