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Simplifying variable expressions?
Simplifying Variable Expressions?
My friend needs homework help. Its about simplifying variable expressions. Here's the problem:
Justify each step.
___________= 5n + (20+9n)
___________= 5n + (20+9n)
___________= (5n + 9n) +20
Please answer soon it's getting late
I put it in this category so I could get faster answers
2 Answers
- Din-dinLv 51 decade agoFavourite answer
I'll do the first one just to show you how to do the rest.
5n + (20 + 9n) =
Get rid of the parentheses. They're not needed in this case. For all the three problems you posted, just remove them.
5n + 20 + 9n =
Add your like terms.
14n + 20 =
To solve for n, subtract 14n on both sides.
So...
20 = -14n
Divide both sides by -14.
20/-14 = -14n/-14
So then you get...
(approximately) 1.429 = n
Source(s): Cheers and God bless you! :D - 1 decade ago
I haven't done these in a long time so I forget how
sorry
hope some one out there has a reasonable answer for you
other than "wrong category"
Cheers
