How many solutions does each equation have? infinite, one, or none?

2x + 4 (x-1) = 2 + 4x

25 - x = 15 - (3x + 10)

4x = 2x + 2x + 5 (x-x)

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?