book Maths Puzzle Numerical Ability

3x over 4x-1 = 1 over x

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book Other Question

3) For the equation x- √x = 0, perform the following:
a) Solve for all values of x that satisfies the equation.

b) Graph the functions y=x and y=√x on the same Hi. Could you explain how to do the following problems using the Pythagorean Theorem to find x?

1. Triangle with legs of 4a and 3a, find x.

2. Equilateral triangle, with x running down the center.

Thanks for any help you can give.