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3 years ago

9

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

1 answer:

anastassius [24]3 years ago

6 0

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

$2x+y-4=0\\ \\ 2*2+y-4=0\\ \\ 4+y -4 =0\\ \\y=0\\ \\\begin{cases} x=2 \\ y=0\end{cases}$

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2 years ago

bryan has some 3 cent stamps and some 4 cent stamps. what is the least number of stamps he can combine so the value of the stamp

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Step-by-step explanation:

Let the number of $3$ cent stamps be $x$ and $4$ cent stamps be $y$

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Step-by-step explanation:

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Step-by-step explanation:

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