−6x + 6y = 6 −6x + 3y = −12

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?

Which of the following can be used to explain a statement in a geometric proof?