book Maths Puzzle Numerical Ability

A man dies and leaves half of his wealth to his wife. He leaves 1/7 of his wealth to his son. He leaves 2/3 of his wealth to his servant and $2,000 to his dog. How much total wealth did the man have?

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there are two solutions for the equation {{{bx^2-cx*a^2+0}}} (where a,b,and c are constants, and x is the unknown). They differ by the sign of the square root. Enter the the on wit Could you please help me with the following question? A circle has a circumfreance of 2.25 what is the radius?