# Simplifying Complex Equations

## Combine Like Terms

Before you begin solving for a variable on a question on the GED math test, you might need to first simplify the equation by combining like terms. For example:

10n – 27 – 3n = 190

It will be much easier to solve for n once you combine the terms 10n and -3n. The way to do this is to subtract 3n from 10n, since it’s minus 3n.

## Remove Parentheses

You will need to get rid of parentheses in order to solve for a variable. If a number or variable is next to parentheses as in the example below, you need to multiply that number or variable by everything in the parentheses.

3(2n – 4) = 36

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• #### antwon

###### August 19, 2012 at 1:31 am

great examples they help better then most books i read

• #### Taninja

###### October 26, 2012 at 10:58 am

I love it I’m not good in math but this site really helping me to understand.

• #### Jairo

###### February 8, 2013 at 7:30 am

Hi its e again 🙂 umm i was looking at an exmple that got me confused can you explina it it goes like this

-4x +7x = -21

i got it to -4x = -28 then i put -7. so x=-7, but the answere was 7 , cna you explain why it was 7not -7? 😀 thank you!

• #### Ziyi

###### February 8, 2013 at 7:46 am

Hi,

You should combine the like terms first, -4x and 7x = 3x.
3x = -21
x = -7
So you got the right answer. Must be a typo in the example you’re looking at.

• #### Jairo

###### February 8, 2013 at 7:55 am

didnt think about combining the like terms! 🙂 that makes it much simpler and easier thank you

• #### Nicole

###### February 26, 2013 at 10:14 am

your website is a big help i have been preping for my GED for awhile and ive been good on everything but math and now that i found your site im understanding better thank you so much hopefully soon i will have my GED 🙂

• #### rj

###### March 15, 2013 at 2:04 pm

i get errthing up till how n = 8 ????

• #### Erin R

###### April 14, 2013 at 2:56 am

Because you have to simplify 48/6 6 will go into 6 once and 6 will go into 48 8 times which is 8/1 which is =8 🙂

• #### Kekesosolo

###### September 7, 2013 at 9:59 pm

This site really helps… Thx

• #### Shonta

###### September 11, 2013 at 2:05 pm

I love this thank u so much

• #### Eric

###### September 18, 2013 at 1:53 pm

This website is a BIG HELP! . Thanks! 🙂

• #### Ivonne

###### September 26, 2013 at 10:32 am

Omg!
This website has helped me tremendously.
I suck at math, and so far i’m understanding everything on this site.
Thanks to whoever made this website.

• #### martez

###### September 29, 2013 at 11:08 pm

How did u get 31

• #### Nakita Thompson

###### November 10, 2013 at 1:18 pm

Hello, I am also confused on how, u came up with 31
. Like alot of other post I’ve read” i to have pass this math test” failed by 20 points. I will pass this time though.. Thanks for your help.

• #### Chris

###### November 14, 2013 at 6:07 pm

Hi, question..How is 3(2n-4)=36? I know 3×2=6 and 3×4=12 but where does the 36 come from?

• #### janel

###### November 15, 2013 at 8:49 pm

please explain the first section…combine like terms. Im confused havnt done much algebra

###### December 16, 2013 at 11:14 am

Yasaaaaaaaaaaaaay thks alot

• #### novell

###### October 5, 2014 at 4:46 pm

ok im stuck on the first exsample how did you get 190. is it 10×10 and 3×30 wich the answer would give me 190 once i add them together?

• #### jessi

###### May 12, 2015 at 1:01 pm

ok I have a problem that I just cant solve…can u help it’s
2y-8=-3y-18

• #### Martana

###### July 18, 2016 at 5:45 am

I still don’t get it

• #### Londyn

###### August 23, 2016 at 9:56 am

What is a combined like term

• #### Leah Douglas

###### January 30, 2017 at 2:26 am

This is so much easier to understand!Thank you!