exam Maths Puzzle Numerical Ability

Simplify

square root of (3x-2=5)

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exam Other Question

I'm not sure where to put this, sorry.
((3^m)(12^(2m+1))* (3^m+1)
Thanks very much! these are suppose to be fractions but i did not know how to put them in.
1/3x + 3/4x = 13 the one third and the three fourths are fractions. thanks for the help.