Answer:
Solving for x gives x=7
Explanation:
First lets rewrite our equation clear, which from the question reads as :
Eqn(1).
This is a case of an equation with one variable (i.e. one uknown) denoted as
.
The question is asking as to solve this equation and obtain the value of
.
To do so we start by rewriting and simplifying the equation as follow:

which is the same as

Here we have a fraction on the left hand side reading as
and an integer on the right hand side as
. Thus we move the denominator of the fraction, in this case
to the right hand side where we multiply it with
, to eliminate our fraction and solve for
as follow:

(Note how we transferd
from the left hand side to the right hand side, the sign changed from negative to positive).