Question 109669
2x - y = 4
2x - y = 6

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Rearrange:
y = 2x-4
y = 2x-6
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Graph:
{{{graph(400,300,-10,10,-10,10,2x-4,2x-6)|}}}
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The lines are parallel; there is no solution for the system of equations.
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Cheers,
Stan H.