Question

7x-5y=-9
5x-7y=-15 *then what is x-y*​

Answer 1

Step-by-step explanation:

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Answer 2

Let's solve for x.

$</p><p>7x-5y=-9 \\ = </p><p>7x−5y+5y=−9+5y</p><p></p><p> \\ = 7x=5y−9 \\ = \frac{7x}{7} </p><p> = \frac{5y−9}{7} \\ = x = \frac{7}{5} y + \frac{ - 9}{7}$

Let's solve for y.

$7x-5y=-9 \\ = 7x−5y+−7x=−9+−7x−5y=−7x−9 \\ = \frac{ - 5y}{5} = \frac{ - 7x - 9}{ - 5} \\ = y = \frac{7}{5} x + \frac{9}{}$