Question

Each of two equal side of a triangle is 3 cm less than twice the third side. If perimeter of the triangle is 69 cm. find the third side.

Answer 1

Answer:

15 cm

Step-by-step explanation:

let the length of each of the two equal sides is x cm

and length of third side is y cm

perimeter = x+x+y=2x+y

2x+y = 69               ...........eq1

now, x= 2y-3          ...........eq2

putting value of x in eq1, we get

2(2y-3) + y = 69

4y-6 + y = 69

5y = 75

y=15