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Intersecting Lines

#2310.31

For which real values of m are the simultaneous equations
y = mx + 3
y = (2m - 1)x + 4
satisfied by at least one pair of real numbers (x, y)?
  1. all m > 0
  2. all m ≠ 0
  3. all m ≠ .5
  4. all m ≠ 1
  5. all values of m
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