Name: bryce
Who is asking: Parent
Question: Suppose that P is a point on the line y = 2x  4 with coordinates (x,y), then x and y are related by the equation. That is if, for example you know that x = 1 then y = 2(1)  4 = 2. Likewise if P, with coordinates (x,y), is on y = x  1. Thus if P is on BOTH lines and you know the xcoordinate then you can find the ycoordinate by either y = 2x  4 or y = x  1. In other words 2x  4 = x  1. Solve this latter equation for x. (This is what is meant by "solve the following problem by setting them equal to each other".) Once you have the xcoordinate you can find the ycoordinate from either y = 2x  4 or y = x  1. I hope this helps,Penny
