What's the explicit formula to find the accounts balance

Nell has a sales clerk job that pays $12 per hour for regular gas work hours. she gets double time for any hours over 40 that she works in a week. how many hours did nell work if her weekly pay was $744

What is the y-intercept of the line given by the equation

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?