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For which values of k does the system of linear equations have zero, one, or an...

For which values of k does the system of linear equations have zero, one, or an infinite number of solutions? [Note: not all three possibilities need occur.] (If the answer is an interval of numbers, enter your answer using interval notation. If an answer does not exist, enter DNE.)

2x1 − x2 = 3
4x1 − 2x2 = k
Math   Calculus   
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