19. 12 feet below the surface
Assume the surface to be zero on a vertical number line. Then the diver is positioned at - 26. He then rises + 14. Finally his position is
-26 + 14 = - 12
That is he is 12 feet below the surface.
20. x = - 2
multiply both sides by 2 to eliminate the fraction.
- 24 = 6x - 12
add 12 to both sides
- 24 + 12 = 6x
- 12 = 6x
divide both sides by 6
- [tex]\frac{12}{6}[/tex] = x ⇒ x = - 2
