The exterior opposite angle is the same as the sum of the alternate interior angles.
We can write an expression and solve for x.
(18x + 5) = 48 + (8x - 3)
~Remove parenthesis
18x + 5 = 48 + 8x - 3
~Combine like terms
18x + 5 = 45 + 8x
~Subtract 5 to both sides
18x + 5 - 5 = 45 + 8x - 5
~Simplify
18x = 40 + 8x
~Subtract 8x to both sides
18x - 8x = 40 + 8x - 8x
~Simplify
10x = 40
~Divide 10 to both sides
10x/10 = 40/10
~Simplify
x = 4
Now, substitute to find ∠WZX
18x + 5
18(4) + 5
72 + 5
77
Therefore, the answer is 77°
Best of Luck!
