feliciamarie321 feliciamarie321

28-08-2017
Mathematics

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What are the solutions of the system 7x + 3y = -3 and y = -2 x ?

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Ilyes39 Ilyes39

28-08-2017

[tex]7x+3y=-3\\ y=-2x\\ So \\ 7x+3(-2x)=-3[/tex]
[tex]7x-6x=-3[/tex]⇔[tex]x=-3\\ y=-2x=6\\ So\ (x,y)=(-3,6).[/tex]

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