X+x=15 combine like terms on left side
2x=15 divide both sides by 2
x=7.5
Answer:
Step-by-step explanation:

80 is the answer to your problem
Answer:
∠5 = 35°
Step-by-step explanation:
∠5 = ∠2 because they are alternate interior congruent angles
∠5 = 35°