If you are looking for the expression, that would be (x+4)/3

is the formula you need do you divide 47.1 by 2 and

so its aproximatly 7.5 or 7.496
X should be 1/2
The way I solved this was by viewing 1/8. I grabbed 8 from the equation and did 8^(1/3) which got me 2. In addition both 1/8 and 1/2^3 in decimal form are both 0.125