Maxim J.

asked • 03/24/14

Solve and check the equation for the indicated variable, 2(n-7)+3=9

How do I find the indicated variable (n) for this and other problems. If I only knew an easy method to do these...it would be fantastic!
 
Another example:
 
8e+3(5-e)=10
 
Please explain step by step!

Kay G.

tutor
Unfortunately I can't edit my comment below.  I'll have to remember that in the future. :-)
 
Distributing is a form of multiplying, so from that point of view, yes you can multiply the 3, by distributing it.  So I probably stated that badly.
Report

03/24/14

1 Expert Answer

By:

Kay G. answered • 03/24/14

~20 Years Accounting Tutoring Experience

Kay G.

tutor
Your second example is a bit different.  Do you see why?  Any ideas on how to maybe approach it?
 
(Hint: you have two e's, but you cannot directly put them together.  Think about what you can and cannot do.)
Report

03/24/14

Maxim J.

Is it different becasue there are two variables, instead of one?
 
Which set of 'e' would I take care of first, would I start with the one outside the paranthesis?
Report

03/24/14

Kay G.

tutor
Keep in mind the other e is inside the parenthesis, and you can't do anything with it as is.  You don't know the result of (5 - e), and the 3 is multiplied by that unknown result.  And you won't be able to do anything with the outside e until you get the inside one taken care of.  (You cannot combine like terms at this point.)
 
However, you can distribute the 3. ;-)  We can't multiply 3 by the result of (5 - e), but we can distribute it.  And that is where you want to start and that will take care of your parenthesis and get rid of them.
 
From there, you will be able to combine like terms and continue pretty much like the other one.
Report

03/24/14

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.