exam Maths Puzzle Numerical Ability

Solve by factoring : 1/3x^2-5/6x-2=0

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exam Other Question

The length of a spring is given by L= 3/4 F + 8, where F is the applied force. What force will produce a 10. I believe the answer will have to be a decimal. Thank you. This equation is on a work sheet that I need to solve:

log (X+5) - log (X-1) = log (X+2) - log (X-3)