The solution is 
Explanation:
The given expression is 
We need to determine the solution of the given expression.
The solution of the expression can be determined by expanding the expression.
Let us use the identity
to expand the term 
Thus, we have,

Simplifying the expression, we have,

Multiplying the term within the bracket, we get,

Thus, the solution of the expression is 
Hey there!
4x - 16 + 2x + 16 = 180 (linear pair)
4x + 2x - 16 + 16 = 180
6x = 180
x = 180/6
<u>x </u><u>=</u><u> </u><u>3</u><u>0</u><u>.</u>
Hope it helps ya!