book Maths Puzzle Numerical Ability

log(x,5)+log(5,x)=2

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Ms. Fabian collected Php 168,000 last year by leasing two apartment units. The rental income from one unit is Php 2,000 per month more than the other unit. If the more expensive un what expresssion will gives the solutions of {{{x^2 + 2x + 3 = 0}}}