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How do you combine the system of equations $- 8 x + 8 y = 0$ $-8x + 8y = 0$ and $- 9 x + 4 y = 5$ $- 9x + 4y = 5$ ?

1 Answer

May 27, 2018

$x = y = - 1$ $x=y=-1$

Explanation:

From first equation, $8 x = 8 y$ $8x=8y$ or $y = x$ $y=x$

Hence, $- 9 x + 4 x = 5$ $-9x+4x=5$ or $- 5 x = 5$ $-5x=5$

Thus, $x = y = \frac{5}{- 5} = - 1$ $x=y=5/(-5)=-1$

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