book Maths Puzzle Numerical Ability

please help me. solve the following

......4p - 1
4+ ------- = 5
........3

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book Other Question

Find both the complement and the supplement of each angle measure of 40 How do I shade the sloution set in an xy plane??? ANd use a test point?

x + y { greater than or equal to sign used} 4
y < 5/2x - 3