Question 529465
Determine whether the point (0, -8) is a solution of the system 
-3x + 9y = 72
9x + 3y = 24
by substituting the point into each equation. 

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-3*0 + 9*-8 = 72:::::::false
9*0 + 3*-8 = 24:::::::false
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It is not a solution.
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Cheers,
Stan H.