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A linear can't have more than one solution. WRONG!

A linear system can have more than 1 solution. It can also have no solution.

Example: x+y=1

z+y=2

This system has infinitely many solutions. Y can equal anything and x and z can then be determined.

Example: x+y=1

y=1

x=5

This system obviously has no solution because if x=5 and y=1, then x+y can never equal 1.

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Q: Can a linear equation have only one solution?
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