exam Maths Puzzle Numerical Ability

Please help with this equation,

x/2-x/6=2

Thank you

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exam Other Question

I need Help, How would I do the following?

Using one of the laws of exponents, prove that any number raised to
the power 0 is 1.
The amount of money A accrued at the end of N years when a certain amount P is invested at a compound annual rate r is given by A=P(1+r)^n IF a person invests $120 at 6% interest