Tìm x, biết biểu thức: (x + 9) + (x - 2) + (x + 7) + (x - 4) + (x + 5) + (x - 6) + (x + 3) + (x - 8) + (x + 1) = 95.

(x + 9) + (x - 2) + (x + 7) + (x - 4) + (x + 5) + (x - 6) + (x + 3) + (x - 8) + (x + 1) = 95

⇔x + 9 + x - 2 + x + 7 + x - 4 + x + 5 + x - 6 + x + 3 + x - 8 + x + 1 = 95

⇔ (x + x + x + x + x + x + x + x + x) + (9 – 2 + 7 – 4 + 5 – 6 + 3 – 8 + 1) = 95

⇔ 9x + 5 = 95

⇔ 9x = 90

⇔ x = 10

Vậy x = 10.