exam Maths Puzzle Numerical Ability

Please help me figure out the value of y.
Problem:
3y + 2 < 7 - 2y

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exam Other Question

if x=-1 and y=2 what is the value of the expression 2x-3xy? Please help me with this problem:

2^5 * 2^b+3 * 2^3-b

Thanks a whole bunch!