Check out my set up. Question 3 Let x = part invested at 15%. Let 8000 - x = part invested at 12%. First Investment = second Investment? 0.15x + 66 = 0.12(8000 - x) Yes? Question 4 Let x = invested at 6%. Let 1000 + x = invested at 10%. 0.10(1000 + x) = 0.06x + 260 Correct equation? [ATTACH=full]2034[/ATTACH]