Please help me, I do not know.

What is the solution of the systems of equations? y=2/3x+3 x=-2

9/10 divide by -3/15 as a mixed number

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?