Ineed to know how to solve 5423 divided by 52 i can't seem to get an answer

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

Trent wants to buy 2 packs of trading cards for 3 dollars each. the trading card packs that trent normally buys tend to come in packs of 6, 10, 12, or 15 cards. after selecting 2 packs, trent found that the first pack of cards cost 25 cents per card, and the second pack cost 30 cents per card. trent uses this information to write the equations below in order to compare c, the number of cards in each pack.

The complement of an angle is one-sixth the measure of the supplement of the angle. what is the measure of the complement angle?