3 years ago

Comparing Methods to solving systems.

Mathematics

1 answer:

Natasha_Volkova [10]3 years ago

3 0

Answer:

$x = - 1 \\ y = 1$

Step-by-step explanation:

$x - y = - 2$

$x = y - 2$

$7x + 2y = - 5$

$7(y - 2) + 2y = - 5 \\$

$7y - 14 + 2y = - 5$

$9y = 14 - 5$

$9y = 9$

$y = \frac{9}{9} = 1$

$x = y - 2 = 1 - 2 = - 1$

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