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OpenStudy (anonymous):
the system of linear equations below has a unique solution for all but one value of a: 9x - 18y= 36 62x + ay=248
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Directrix (directrix):
Something happens at a = -124.
OpenStudy (anonymous):
that is correct
Directrix (directrix):
The lines collapse and become one so there are infinitely many solutions like that other problem.
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