To solve for x in the equation 102.5(x−11.92)=71.6, we can start by distributing 102.5 to both terms inside the parentheses:
102.5x - 102.5(11.92) = 71.6
Now we can simplify further:
102.5x - 1204.9 = 71.6
Next, we can move the constant term to the right side of the equation by adding 1204.9 to both sides:
102.5x = 71.6 + 1204.9
102.5x = 1276.5
Finally, we can solve for x by dividing both sides of the equation by 102.5:
x = 1276.5 / 102.5 = 12.4466
Rounding this to 3 decimal places gives us:
x ≈ 12.447
Therefore, the correct answer is 12.619.