exam Maths Puzzle Numerical Ability

4 sqrt(3) minus sqrt(64) plus 6 sqrt( 27)

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exam Other Question

I have been trying to solve the following problem for 2 days:

5x-9+2x=3x+23-4x

The answer is suppose to be x=4; but I get 14 or 6 and I am not sure what I am doing wrong. Please help!

Thank you,
Cheryl find three consecutive odd numbers whose sum is 111