Question

PLEASE HELP ME WITH THIS QUESTION

Answer 1

Set 7x-4 and 31 equal to each other
7X-4=31
Add four to both sides
7X=27
X=3
The answer is D

Answer 2

As per the problem we can see that

There two triangles with equal corresponding sides.

So we can set up the equation as below:

$7x-4=31\\ \\ \text{Add 4 on both the sides we get}\\ \\ 7x-4+4=31+4\\ \\ 7x=35\\ \\ \text{Divide both the sides by 7 we get}\\ \\ x=5$

Hence the value of x is 5.