book Maths Puzzle Numerical Ability

log x/n=log(x^1/n)

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|2y-3|=29 my questions is, in this equations when taking out the number in the absolute value bar should i live the equation as 2y-3 or 2y+3...or do u only make it positive when there is only one number for example |-2y| to 2y? twnty more than a number is-12. find the number
didnt grasp u question
but if u r sying the number then the answer is -32 i think so plz clear it to me