What is the solution to the equation? -3(2x-7) +4x=15

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

What is the value of x in the this question ?

Asurvey of 45 teens found that they spent an average of 25.6 hours per week in front of a screen (television, computer, tablet, phone, based on the survey’s sample mean, which value could be the population mean? 2.3 hours 27.4 hours 75.3 hours 41.5 hours