Complete Chapter 20 (exercise 19 was last incomplete) + fix LinearEqu…#42
Merged
HarryDulaney merged 1 commit intomasterfrom Dec 7, 2022 
Merged
Complete Chapter 20 (exercise 19 was last incomplete) + fix LinearEqu…#42HarryDulaney merged 1 commit intomasterfrom 
HarryDulaney merged 1 commit intomasterfrom