Solution: If 8 is added to the product of 9 and the numerical number, the sum is 71

If eight is added to the product of nine and the numerical number, the sum is seventy-one. Find the unknown number. How to solve digit problems?

If 8 is added to the product of 9 and the numerical number, the sum is 71

Problem Statement: EE Board April 1993

If eight is added to the product of nine and the numerical number, the sum is seventy-one. Find the unknown number.

Problem Answer:

The unknown number is equal to 7.

Solution:

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