detroittigersarecool detroittigersarecool 21-10-2022 Mathematics Answered Angles ABC and DBE are vertical angles where m∠ABC = (7x + 7)° and m∠DBE = (8x − 4)°. Part A: Solve for x. Show every step of your work. Part B: Are the vertical angles also supplementary angles? Explain. Please help me I'm stuck.