A binary operation ? is defined by a?b = a + b + 1 for any real numbers a and b. Find the inverse of the real number 7 under the operation ?, if the identity element is -1.

This question A binary operation ? is defined by a?b = a + b + 1 for any real numbers a and b. Find the inverse of the real number 7 under the operation ?, if the identity element is -1. is a jamb, neco, waec maths question.

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