R= and c = find the missing measurement

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Adele is five years older than timothy. in three years, timothy will be 2/3 of adele’s age. what is adele‘s current age?

Suppose m: angle a =77 degrees what is the measure of a complement of a complement of angle a, what is a conclusion you can draw about a complement of a complement of an angle