13-10-2019
Mathematics

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3x + y = -9
y=1 - 3x

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13-10-2019

Answer:

[tex]3x + (1 - 3x) = - 9 \\ since \: y \: = 1 - 3x \\ 3x + 1 - 3x = - 9 \\ 0 = - 9 - 1 \\ 0 = 10[/tex]

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