exam Maths Puzzle Numerical Ability

x+7 37 x-2
_ = - ____
3 15 5

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exam Other Question

Please help me solve the ff. equation.
1. x^2 = 16i
2. x^3 + 64 = 0
3. x^3 -(32 + 32i sqrt3) = 0
4. 16x^4 = i
5. x^5 - 32 = 0
6 x^3 +(1/2 - i√3/2) = 0 Can someone help me with this problem?

I need to find the mean of the following set of numbers:

13, 15, 18, 18, 18, 19, 22, 26, 28, 33

Thank you,
Sher