exam Maths Puzzle Numerical Ability

I am having trouble with these types of problems can you help?


Solve for x. Collect xs on the LEFT side. The solution should be presented with x first, the correct inequality symbol, then the number.
3(4x – 5) < 9

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exam Other Question
Depreciating a computer. A computer is purchased for $3000 and is to be depreciated linearly over four years. Assume that it has no value at the end of the four years.
a. Find th Simplify: (1 + i)/(2 - i).

Thanks