Can someone explain? i don't understand
6(2x – 11) + 15 = 3x + 12
part a: write the steps you will use to solve the equation, and explain each step. (6 points)
part b: what value of x makes the equation true? (4 points)

Me what is the value of x? showing work would be appreciated - ! : )

Big boi and travis scott are performing at the super bowl. travis scott is 62 years younger than twice big boi’s age. the sum of their ages is 70 years old. use b to represent big boi’s age. write and solve an equation.

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?