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3 years ago

Answer for brainliest

Mathematics

1 answer:

ollegr [7]3 years ago

8 0

Answer:

(-4, -1) (see below)

Step-by-step explanation:

Substitution means that you actually replace, or "substitute," the value of the variable in.

Here, y = -1, so -3x - 8y = 20 can be written as:

-3x - 8 (-1) = 20

We can now solve for x:

-3x + 8 = 20

-3x = 12

x = -4

Putting this into (x, y) format equals:

(-4, -1)

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