[ATTACH=full]1788[/ATTACH] 15. x + x + 2 16. x + x + 2 17. 0.05x 18. First investment = x; second investment = ,000 - x 19. D = 3x 20. D = (2x/3) 21. x + 20 22. 3x 23. x/8 24. 4x 25. 3 = 4 + x You say?