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Sigrid Hill

Lvl 10
3y ago
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Wiki User

13y ago

Solve for x:

3x - y = -9 is the same as 3x + 9 = y

Since you now know the equation for y you can plug it into the first equation:

3x - (3x + 9) = -9

After solving, you will also see that x cancels out and that -9 = -9.

Solve for y:

3x - y = -9 is the same as y/3 - 3 = x

Since you now know the equation for x you can plug it into the first equation:

3(y/3 - 3) - y = -9

After solving, you will also see that y cancels out and that -9 = -9.

The Answer:

There are actually two posibble answers:

1.) y = -9 and x = 0

If you plug the numbers in then you will get 3(0) + (-9) = -9

The answer is -9 = -9

2.) y = 0 and x = -3

If you plug the numbers in then you will get 3(-3) + (0) = -9

This will also give you the answer -9 = -9

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Q: What is the answer for 3x - y equals -9?
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