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None of the given responses is correct.
To solve the equation, you need to isolate the variable y.
Starting with the equation 23.86 = y - 16.2, add 16.2 to both sides:
23.86 + 16.2 = y - 16.2 + 16.2
This simplifies to:
40.06 = y
So the correct answer is:
y = 40.06