How it works ?
Step 1: In the sketch below, drag the RED line around by the RED points.
Step 2: Drag the BLUE line around by the BLUE points. Notice the equations of each of the lines.
Step 3: Use these equations to solve for the coordinates of point E.
Step 4: Use substitution to solve.
Step 5: Click on the check box to check you answers or to get a hint.
Step 6: You should repeat this until you get 5 correct.