This should be really easy but I've been trying to some of my A-Level homework and I can't get my head around it.

For example.

6root7 - 2x = 5 + (3root7)x

there's more than one way I can seperate the x's, and each way seems to give me different solutions.

I can do:

6root7 - 5 = (3root7)x + 2x

-2x - (3root7)x = 5 - 6root7

- (3root7)x - 2x = 5 - 6root7

Is there a special way to do this, am I missing a way to order where each number is placed to make sure I get the right answer?

Should be such as easy question, especially for an A-Level student but a couple of questions like this are catching me out.

Any help would be greatly appreciated.