exam Maths Puzzle Numerical Ability

Please explain

(2x)divided by (x-1)

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exam Other Question

Solve the system of equations by graphing. Then classify the system as consistent or inconsistent; and the equations as dependent or independent.

3u+v=18
3u=v+30

Help what is up with th u and v I do not understand. The price of a new car increased by 2/3 over the last 5 years. If the original price of the car was $6,000, what is the new price today?