5x+2 + 5x+1 – 5x < 3x/2+1 – 3x/2 – 3x/2–1.
5x·(52+5–1) < 3x/2·(3–1–(1/3)) 5x·29 < 3x/2·5/3 (5/√3)x < 5/87 x < log5/√3(5/87)