Question

A single equation representing both lines x+y=0 and x+2y = 0 is ?

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Answer 1

Answer:

The single equation is $y = 0$

Step-by-step explanation:

We are given the following system of equations:

$x + y = 0$

$x + 2y = 0$

From the first equation:

$x = -y$

Replacing in the second equation:

$-y + 2y = 0$

$y = 0$

The single equation is $y = 0$