book Maths Puzzle Numerical Ability

(y+3)5/2=32

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book Other Question

Simplify the following expression as much as possible:

t^2 square root of 8tx^2 -(minus) x square root of 18t^5
Two numbers have a sum of 39. Their difference is 11. What are the two numbers. Please show me how to set this problem up. Thank you.