Question

The length of the base of an isosceles triangle is x. The length of a leg is 4x−6. The perimeter of the triangle is 42. Find x

Answer 1

x = 6

Explanation:

x + 2(4x-6) = 42

x + 8x - 12 = 42

9x = 42 + 12

9x = 54

9/9 x = 54/9

x = 6