exam Maths Puzzle Numerical Ability

2,4,8,16,32

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exam Other Question

Find two numbers such that twice the first exceeds three times the second by 1, and three times the first exceeds twice the second by 14. How do you solve equations like these?
Rules:Simplify but leave in radical form

1.) radical 20a^2
2.) radical 30a^7
3.) 5 radical 250

Please help
And thank you