This problem is asking you to use angle relationships (vertical angles, supplementary angles) to solve this problem.
Step-by-step explanation:
1. The vertical angles between ∠1 & ∠2 are equal, so find the value of x using an equation that sets them as equal to each other.
4x - 48° = x + 30°
2. These two vertical angles are supplementary to ∠1 & ∠2 on their corresponding sides (∠1 & x + 30°, ∠2 & 4x - 48°). Subtract the value of x from 180°, which is the degree of a straight line.
