exam Maths Puzzle Numerical Ability

1/x-5 - x/x^2-25 <---all over 5/2x

Simplify the complex fraction.

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exam Other Question

I need to set up a 3 by 3 system of linear equation and solve for it on the following word problem.

Kathy has $20,000 to invest. She wants to diversify into three types of inve the equation is 1 minus x over 3 in absolute value bars is greater than or equal to 2 over 3.