exam Maths Puzzle Numerical Ability

How do I solve by using two equations with two variables?

The sum of the digits of a two-digit number is 8. If the digits of the number are reversed, the new number is 18 less

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exam Other Question
Write a real number with ten digits to the right of the decimal point that is an irrational number between 2 and 4 Please show me how to do this!

Divide

x^3 - 2x^2 - 33x - 7/x - 7

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