Elevator 1 moved up 10 feet from the ground level. its position is labeled as +10. elevator 2 moved down 5 feet from the ground level. its position is labeled as (use the hyphen for negative such as -1)

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)