Question 254671
5x-5y=20
5y-5x=-20 
solve the system of equtions by graphing.
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Solve each equation for "y":
1st:
5x-5y=20
x-y = 4
y = x-4
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2nd:
5y-5x=-20
y-x = -4
y = x-4
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The two equations are the same so their graphs are the same line.
{{{graph(400,300,-10,10,-10,10,x-4)}}}
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Solution: All points of the form (x,x-4) where x is any Real Number.
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The system is described as being "dependent".
Cheers,
Stan H.