Step-by-step explanation:
Hey there!
Your required answer is option B.
Here,
Given,
The figure is an equilateral triangle with, side (7x+9) and (x+27).
By the defination of equilateral triangle we have,
All sides of equilateral triangle are equal.
So,
Simplify them to get answer.
Therefore the value of x is 3.
Hope it helps...