exam Maths Puzzle Numerical Ability

Solve for x: sqrt(2x-1) - sqrt(x+3) = 1

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exam Other Question

hi, i need some help with this equation

x-5/3y=7
4/7x+y= -13/7

if possible express the answer as an ordered pair. thanks! Find the domain of f(x)=(3x^2 - 2x + 1)/(x^2 + 9)