Solve the equation :
A) 7(3x – 6) + 5(x - 3) - 2(x - 7) = 5 ,
B) (x -3)(x + 4) - 2(3x - 2) = (x - 4)2,
C) (x + 1)3 – (x - 1)3 = 6(x2 + x + 1) Choose the most appropriate option:
A) 3, 8, -2/3	B) 2, 8, -2/3	C) 4, 8, -2/3	D) 5, 8, -2/3	E) None
Solution:   A) 21x - 42 + 5x - 15 - 2x + 14 = 5&lt;=&gt;   21x + 5x - 2x = 5 + 42 + 15 - 14&lt;=&gt;   24x = 48 &lt;=&gt; x = 2   2, 8, -2/3) x2 + 4x - 3x - 12 - 6x + 4 = x2 - 8x + 16 &lt;=&gt;   x2 - 5x – x2 + 8x = 16 + 12 – 4 &lt;=&gt;   3x = 24 &lt;=&gt; x = 8   C) x3 + 3x2 + 3x + 1 – (x3 - 3x2 + 3x - 1) = 6x2 + 6x + 6 &lt;=&gt;   x3 + 3x2 + 3x + 1 – x3 + 3x2 + 1 = 6x2 + 6x + 6 &lt;=&gt;   2 = 6x + 6 &lt;=&gt; 6x = -4 &lt;=&gt; x = -2/3   Answer 2, 8, -2/3
<result>B</result>
Solve the equation :
A) 7(3x – 6) + 5(x - 3) - 2(x - 7) = 5 ,
B) (x -3)(x + 4) - 2(3x - 2) = (x - 4)2,
C) (x + 1)3 – (x - 1)3 = 6(x2 + x + 1)