book Maths Puzzle Numerical Ability

While vacationing in the orient, Sonia spends $200 purchasing ornate chess sets for her figt shop in California. A week later she finds the same chess set selling for $5 less per p

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book Other Question

How do I graph 4x - 5 how can i soved this equation? coz I keep on solving it but i can't:
[(x^5-3x)+(3x^2-1)][(x^5-3x)-(3x^3-1)]