Making X the subject. Know nothing need help

Homework Statement

Hello. This is my first post, hoping its in the right section. Now when it comes to physics I dont really have a clue, biology is my strong point. But still need to know this. When making X the subject what do I need to learn? I know the basics such as y = X - 3 is X = y + 3 ect. But need to know when to divide both sides of the equation by another thing in in the equation. Or what do I do when there is a squared or brackets involved. Sorry for my stupidity. Im trying. Any help appreciated. Thanks for reading

The Attempt at a Solution

Doc Al
Mentor
Sounds like you need to brush up on basic algebra.

Sounds like you need to brush up on basic algebra.

Well that's why I'm here. I just asked what steps are involved with something like something like a=(x-u)/t, or a=-3+x². Not to be told what I already knew

Doc Al
Mentor
Well that's why I'm here. I just asked what steps are involved with something like something like a=(x-u)/t, or a=-3+x². Not to be told what I already knew
We are not mind readers. Unless you present a specific question and show your work and where you got stuck, how are we to know how to help you?

Since you already know that it's algebra you need help with, what steps have you taken to brush up on your algebra?

As far as your specific examples, why not tell us what you think needs to be done in each case to isolate the x? Hint: The basic idea is to always do the same thing to each side of the equation. (See: Golden Rule of Algebra)

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We are not mind readers. Unless you present a specific question and show your work and where you got stuck, how are we to know how to help you?

Since you already know that it's algebra you need help with, what steps have you taken to brush up on your algebra?

As far as your specific examples, why not tell us what you think needs to be done in each case to isolate the x? Hint: The basic idea is to always do the same thing to each side of the equation. (See: Golden Rule of Algebra)

Sorry mate, I snapped a bit there (long day). Ive been looking through my old math DVD's which were to suppose to offer an "in depth" review of the steps but turns out to be whistle stop tour of confusion. So for the equation a=(x-u)/t would I be able to times both side by t and use that to get at=x-u? Because I can happily work that out to be x=at+u. Is that right at all?

Doc Al
Mentor
So for the equation a=(x-u)/t would I be able to times both side by t and use that to get at=x-u? Because I can happily work that out to be x=at+u. Is that right at all?
Perfectly right.

Perfectly right.

Well then i'm making progress. So thank you. Now to the next example a=-3+x². I'm confused as to how to remove the ² from the x². This is what's really confusing me (as said I'm not good at physics, really just biology) how would i do that?

This has less to do with physics than with math. What do you know about square roots?

Doc Al
Mentor
Well then i'm making progress. So thank you. Now to the next example a=-3+x². I'm confused as to how to remove the ² from the x². This is what's really confusing me (as said I'm not good at physics, really just biology) how would i do that?
Start by getting the x2 off by itself. How would you do that? Once you do that, you can take the square root of both sides.

HallsofIvy