book Maths Puzzle Numerical Ability

can you solve this equation by breaking the equation by step?

The Equation is 3/2x=4=-9

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book Other Question

The sum m & n ,divided by the difference m & n can you tell me if I have got the right answer

( 4x^5y)^3
(--------) = 48x^7
(16xy^4) -------
y^9