exam Maths Puzzle Numerical Ability

Solve the following application and show your work.
Solve and graph the solution set of the following inequality.
7(x - 3) > 5x - 14

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exam Other Question

This one has me in a spin.

Simplify:
4m/5n^2-n/2m
Please help, it says to solve by completing the square.
x^2-3x+1=0
What I got for this was x-2 x+8 2-83
I am not so sure about my answer, please help! Thank You=)