Answer: The required value of x is -1.
Step-by-step explanation: We are given the following system of linear equations :

We are to find the value of x.
To find the value of x, we need to substitute the value of y from equation (i) in equation (ii).
From equation (i), we have

Substituting the value of y from equation (iii) in equation (ii), we get

Thus, the required value of x is -1.