To solve the equation, we need to rearrange it to isolate the variable:
-س^3 + 18 = 0
Subtract 18 from both sides:
-س^3 = -18
Divide by -1 to simplify:
س^3 = 18
Now, to solve for س, we need to find the cube root of 18:
س = ∛18
Calculating the cube root of 18 gives approximately 2.620.
Therefore, the solution to the equation is س ≈ 2.620.