Solve the equation for x : 6x – 27 + 3x = 4 + 9 – x

Solve the equation for x : 6x – 27 + 3x = 4 + 9 – x

A. 4
B. 5
C. 6
D. -4
E. None of these
Explanation:
9 x + x = 13 + 27
10 x = 40 => x = 4