(adsbygoogle = window.adsbygoogle || []).push({}); Separable equations: How do you know which variable to solve for? + extra question

1. The problem statement, all variables and given/known data

I attached a sample problem with variables u and t. How do I know what the answer should be at the end? In terms of u or in terms of t or it doesn't matter?

1. The problem statement, all variables and given/known data

I also have another question, so to prevent spam I will also post it in this thread:

The second picture I attached is the question and I ended up with the answer (as shown in my picture):

y = ±(|2a|sinx/(√3/2))-a

For this question I am confused about the plug or minus sign conventions when you remove absolute value brackets. The answer key shows:

y = (4asinx/(√3/2))-a

It doesn't even have the plus or minus sign or the absolute value brackets for 2a.

Is my answer correct as well?

Thanks!

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Separable equations: How do you know which variable to solve for?

**Physics Forums | Science Articles, Homework Help, Discussion**