Final answer:
The value of x is 50.
Step-by-step explanation:
In the given question, line WX is parallel to line YZ. We are given that m ABY = (3x - 5) and mZBU = (2x + 45). Since line WX is parallel to line YZ, the alternate interior angles ABY and ZBU are congruent. Therefore, we can set the two measures equal to each other:
3x - 5 = 2x + 45
Now, we can solve for x:
3x - 2x = 45 + 5
x = 50
Therefore, the value of x is 50.