Subject: common solution Name: Samantha Who is asking: Student Level: Middle Question:
For the first problem think of (x,y) as a fixed point that is on both graphs, x+y=6 and 2x3y=2. Since (x,y) is on the first graph the numbers x and y are related by x+y=6. Subtracting x from both sides this relationship becomes y = 6  x. Since (x,y) is also on the graph of the second equation the numbers x and y satisify the second equation 2x3y=2. But we know that y = 6  x and hence For the second problem you are looking for an expression that is equivalent to 3x  y = 4 which is of the form or y = 4  3x Penny
