exam Maths Puzzle Numerical Ability

please help me to fin the answer of this question : ab+a-b=2001, find the value of a and b. if a and b are a real number.

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exam Other Question

Its from an online test and i never received a score back and im still stumped on it days later!!

-Find a linear function P(t) that fits this data.

-(Hint: remember the earli Please graph the inequality 4x+y is greater than or equal to 4