exam Maths Puzzle Numerical Ability

Hello! I am having problems with with the problem and need some help.

solve: Square root x-1 =x-3

Thank you for the help

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exam Other Question

A bank loaned out php12.000, part of it at the rate of 8%per yaer and the rest at the rate of 18%per year. If the invest recieved totaled php1,000, how much was loaned at 8% 3x - 8(3-x) = 53