Question

In a equilateral triangle if one side is represented as (2x+5) and it's perimeter is 51. find x

Answer 1

Here is your answer....

The side of an equilateral triangle is 2x+5

i.e = 2(6)+5
= 17 cm

The value of x = 6

Hope this helps you.....✌

Answer 2

perimeter of the equilateral triangle=3a
=51
=>3a=51
=>a=51/3
=>a=17
each side of the equilateral triangle=(2x+5)=17
=>2x=17-5
=>2x=12
=>x=12/2
=>x=6