How many solutions does 6x+2=2+6x have? How many solutions does 4x-5=4x-5 have?

How many solutions does
-x-8= -x+8 have?

How many solutions does 7x-3=4x+3 have?

PLEASE ANSWER AS MANY AS POSSIBLE WORTH 20 POINTS!

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

Can someone me with this problem i don't understand i need

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?