book Maths Puzzle Numerical Ability

Solve by addition. If a unique solution does not exist, state whether the system is inconsistent or dependent.
2x + 3y = 1
5x + 3y = 16

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book Other Question
the time it takes to complete a certain job varies inversely to the number of people working on that job. If it takes 36 hrs for 7 carpenters to frame a house, how long will it take 54 carpenters to do the same job? Expand

logbx^2y^3/z^4

I do not understand how to expand this. Could someone help me.

Thank you