Question

two equal sides. of a triangle are each 5meter less than twice the third side .if the perimeter of the triangle is 55 meters. find the length of its side?

Answer 1

Let unknown sides be x

2x+5=55

2x =50

x = 50÷2

x=25

Answer 2

Let the third side be x m

Hence , other two sides will be :

2x -5, 2x -5

Now the perimeter = 55m

Hence,

2x - 5 + 2x -5 + x = 55

4x - 10 + x = 55

5x - 10 = 55

5x = 55 + 10

x = 65/5

x = third side = 13m