exam Maths Puzzle Numerical Ability

Can you please help me solve this problem?
5/2x+1/4x=3/4+x

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exam Other Question

How do I expand the following to include all stages:
2
(x+2)(x + 7)

Hope you can help me.
rewrite each expression using positive exponents and simplify.

3x^2 (4x^3)^-2

(6^2x^3y^-4/12x^-2y)

evaluate the expression

(64)^-2/3

perform the operation and write