{ ∜((1/x) )-12 }(-2)/3
Answers
Answer:
The question as it is currently phrased (at 2018 Jan 30 Tue 0750H Au EST) is “What is the value of x of x of x^1/2 +x^1/3 =12?”
We can validly ask the numerical value of a variable or an expression, but not the numerical value of an equation.
I suspect a typo has crept in, and that one of the “of” was meant to be “if”. Possible corrections would read as follows;
POSSIBILITY #1: What is the value of x … IF x of x^1/2 +x^1/3 =12? (where we interpret “of” to mean “multiplied by”,
in the same way that 1/2 of 1/2 = (1/2) * (1/2) = 1/4)
PS … I have restricted the calculation of solutions to the set of real numbers.
Grab a calculator and test the following solution for yourself.

POSSIBILITY #2: What is the value of x of x … IF x^1/2 +x^1/3 =12? (where we interpret “of” to mean “multiplied by”,
in the same way that 1/2 of 1/2 = (1/2) * (1/2) = 1/4)
PS … I have restricted the calculation of solutions to the set of real numbers.
Grab a calculator and test the following solution for yourself.