Question

-x-y=5 and -x+4y=15 by substitution method​

Answer 1

Answer:

13

Step-by-step explanation:

Answer 2

Answer:

$y = 2 \\ x = - 7$

Step-by-step explanation:

$- x - y = 5 \\ - x + 4y = 15 \\ - 5y = - 10 \\ 5y = 10 \\ y = \frac{10}{5} \\ y = 2 \\ \\ put \: the \: value \: of \: y - \\ - x - y = 5 \\ - x - 2 = 5 \\ - x = 5 + 2 \\ - x = 7 \\ x = - 7$

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