EXPLAIN THE MISTAKE FIND THE CORRECT ANSWER

SOMEONE PLEASE HELP ME ILL GIVE YOU BRAINLIST ANSWER

1) Mistake is that vertical angles are congruent and equal meaning the product of 5x should be equal to the other side being 100. Answer is x=20

2) Mistake is that the angle's measure should've added up to 90. Answer is x=17

3) The math is done incorrectly with the first step as the coefficients can't be added with constants. Answer is x=21.5

Step-by-step explanation:

The following image is written proof

all it means is function 3

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step-by-step explanation: