aidandevone16 aidandevone16

31-03-2014
Mathematics

Answered

When you eliminate y What is the resulting equation of 2x+y-4=0 and 2x-y-4=0

Answer :

31-03-2014

[tex]\begin{cases} 2x+y-4=0 \\ 2x-y-4=0\end{cases}\\ + \ \ -------\\ 4x-8=0\\ \\4x=8 \ \ /:4\\ \\x=\frac{8}{4}\\ \\x=2[/tex]

[tex]2x+y-4=0\\ \\ 2*2+y-4=0\\ \\ 4+y -4 =0\\ \\y=0\\ \\\begin{cases} x=2 \\ y=0\end{cases}[/tex]

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