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

Answer 1

12

Answer 2

Well, darling, the answer is not going to magically appear out of thin air. You need to give me more information. Is there another equation or some context to this problem? I may be good, but I'm not a mind reader.

Answer 3

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