book Maths Puzzle Numerical Ability

Solve the following equation for A: 2A/3=8+4A

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Another factoring method question. I just can't seem to understand these problems that want me to use the factoring method

(x^2/4) - 1 - 2x = -1

Can someone please help me ou
can you tell me how to get numbers 40-60 by using only four nines? you can not use any other number. you may use any mathmatical operation(addition,sutaction,multiplication,divisio