Answer:
x = 4
Step-by-step explanation:
6x + 42 and 18x - 6 are alternate angles and are congruent , so
18x - 6 = 6x + 42 ( subtract 6x from both sides )
12x - 6 = 42 ( add 6 to both sides )
12x = 48 ( divide both sides by 12 )
