Answer: We can find the value of x by solving the equation 2x + 1/3x = 4.
Combining the terms on the left side, we get:
(6/3)x = 4
Dividing both sides by 6/3, we get:
x = 2
Substituting the value of x back into the expression 27x³ + 1/8x³, we get:
27 * 2³ + 1/8 * 2³ = 27 * 8 + 1/8 * 8 = 216 + 1 = 217
So the value of the expression 27x³ + 1/8x³ is 217.
Explanation: