45-45-90 Triangles: The length of one side of AABC below is given. Use the relationship among the sides of a 45 ° -45 ° -90 ° triangle and then find the lengths of the other two sides.

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)