math sitesmath for kidsmath for ages 13-100algebra lessonsteachers math areaparents math areamath gamesScience MonsterSpike's Game Zone
Coolmath Books: Math Anxiety & Success, Algebra, Precalculus ReviewOTHER SITES:Finance FREAKTotally Stressed Out

Cool math Prealgebraby Karen at Coolmath.com
Coolmath Prealgebra
Solving Equations Lesson 4 - What to Do - Putting Parts 1 & 2 Together   (page 2 of 3)
---- This prealgebra lesson explains how to solve an equation when you need to add or subtract something from both sides AND multiply and/or divide by something.
line
Graphing Calculator Scientific Calculator << a new window will open for these
line

Check it!

2x - 7 = 3 ... 2(5) - 7 = 3 ... 3 = 3

 Yep!

YOUR TURN:

Solve          3x + 8 = -7          *And check it!

Here's one with a bit of a twist:

Solve    6 - x - 6 = 7 - 6 which gives -x = 1

 

Ditch the 6:

x isn't quite alone yet!
Multiply both sides by -1:

 (-1)(-x) = (1)(-1) which gives x = -1
 

OK, so what if there are x's on both sides?

9 - 3x = 5x + 6

Here's the game:

Get all x guys on one side and all number guys on the other.

*Ditch the smallest x guy first!  (Trust me.)

Continued on the next page

 The printing, distribution and/or downloading of these lessons is strictly prohibited.
line
Graphing Calculator Scientific Calculator << a new window will open for these
line
go to the previous page of this algebra lesson

go to the menu for this topic
go to the full prealgebra lessons menu

go to the next page of this algebra lesson

|||||   copyrights and fair use of these lessons   |||||

.....:::::::::::::::  HELP SUPPORT COOLMATH  :::::::::::::::.....
:::::::  link to us   :::::::   advertise with us  :::::::
 
 ||  about us  ||  safe surfing  ||  privacy policy  ||  terms of use  ||  copyrights & fair use  ||
||  math  ||  math for ages 13-100  ||  math for kids  ||  math for teachers  ||  math for parents  ||  math games  ||  algebra  ||
||  math help lessons  ||  math practice problems  ||  online math dictionary  ||  algebra books  ||  math anxiety  ||
||  science  ||  free online games and puzzles  ||  continuing teacher education  ||

Thanks for visiting Coolmath.com
© 1997-2007 Coolmath.com, Inc.