Please help asap i’ll give a brainliest to the person with the correct answer

Will give a: 122 b: 90 c: 48 d: 180

Match the following reasons with the statements given to create the proof. 1. do = ob, ao = oc sas 2. doc = aob given 3. triangle cod congruent to triangle aob vertical angles are equal. 4. 1 = 2, ab = dc if two sides = and ||, then a parallelogram. 5. ab||dc if alternate interior angles =, then lines parallel. 6. abcd is a parallelogram cpcte

When solving a logarithm equation, how do you find the missing variable ?