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4 years ago

Solve -2x-y=1 y=3x-1

Mathematics

1 answer:

Brilliant_brown [7]4 years ago

4 0

Answer:

x=-2/5

y=-1/5

Step-by-step explanation:

$-2x-y=1\\y=3x-1$

Get the y variables onto 1 side

$y+1=-2x\\y=3x-1$

Now shift the 1 over

$y=-2x-1\\y=3x-1$

To solve for x, we can subtract the second equation from the first equation

$(y-y)=-2x-3x-1-1 = 0=-5x-2\\5x=-2\\x=-2/5$

Plug back into the first equation we found and solve for y

$y=-2x-1\\y=-2(-2/5)-1\\y=4/5-1=-1/5$

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3 years ago

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