Book Maths Puzzle Algebra

Find three consecutive even integers such that if three is added to the second consecutive even integer, the square of the result is 49

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Book Other Question

Elise is four times as old as Amanda. In ten years, Amanda's age will be half of Elise's. How old are they now? The sum of the digits of a three digit number is 20. The tens digit is three less than the hundreds digit. If the digits are reversed, the new number is 198 more than the original