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A two digit number is 7 times the sum of its two digits. The number that is formed by reversing its digits is 18 less than the original number. What is the number?

A number consists of two digits whose sum is 8. If 18 is added to the number, its digits are interchanged. The number is

The digit in the unit's place of the number represented by $(7^{95} - 7^{58})$ is