Question

The length of the base of an isosceles triangle is x. The length of a leg is 2x-3. The perimeter of the triangle is 19. Find x

Answer 1

Explanation:

isoceles means that the triangle has 2 equally long legs.

the perimeter is the sum of all sides.

so,

19 = x + (2x - 3)×2 = x + 4x - 6 = 5x - 6

25 = 5x

x = 5