# Pre-Algebra

How do you solve 4x+4=9x-36?
I understand that you need to get the variables alone but to I add or subtract 9x to both sides?

1. 👍 0
2. 👎 0
3. 👁 151
1. 4 x + 4 = 9 x - 36
9 x + 4 = 9 x + 4
===================== subtract
-5 x + 0 = 0 x - 40

-5 x = -40 divide both sides by 5
x = 8

1. 👍 0
2. 👎 0
posted by Damon

## Similar Questions

1. ### science

Writing variables and hypothesses What about them? i don't even understand them and i have to make up 4 variables and hypothesses about independent and dependent variables i don't even understand them and i have to make up 4

asked by Farah on September 18, 2006
2. ### Algebra

I don't quite understand how to solve matrices with three variables. If I have the equations: 7x-4y-2z=0 2x-3y+z=-0.25 -2x-2y+5z=0 How can I solve this? I saw the explanation in a site but I didn't understand it. They appeared to

asked by Amy on March 24, 2012
3. ### math

what makes the use of variables diffcult to understand? what makes them difficult to understand is : Depending on which variables are used somehow they have to predict just how they vary, and what factors influence the variation

asked by jordan on January 9, 2007
4. ### Algebra

define the following new variables X to A =W X to B =X Y to A =Y Y to B =Z w+x=32 y+z=8 w+y=22 x+z=18 You helped me solve for y Ijust added w+y=32 220w+300(32-w)+400(22-w)+180(8-y)=9280 , w+y=22 The answer I got was y=32 I solved

asked by mike on December 25, 2009
5. ### TO DRWLS/MATH HELP PLEASE

How do i solve inequalitites with three variables. I still can't figure it outplease help. x+y=1 y-z=-3 2x+3y+z=1 THE ANSWERS ARE X=3,Y=-2,Z=1 i KNOW THE ANSWERS I JUST DON'T KNOW HOW THE BOOK GOT THE ANSWERS . i 'VE TRIED MANY

asked by Jasmine202005 on October 22, 2006
6. ### physics

a person is pulling a 100 lb box across a smooth horizontal surface. what is the acceleration of the box if they are pulling upward at an angle of 20° with a force of 75 lbs Well, I know that there is no friction involved because

asked by Hanky on March 9, 2015
7. ### Math

How do you solve an eguation with 2 variables? You have to have two independent equations to solve for each of the variables.

asked by Jane on March 3, 2007
8. ### MATH,ALGEBRA

My questions are: why are variables useful in algebra? Also, what makes the use of variables difficult to understand? Variables are things that change or vary. Depending on which variables concern you, you might want to be able to

asked by jasmine20 on December 27, 2006
9. ### Pre-Calculus

Could you please explain how to use a matrix (matrices) to solve a system of linear equations (two variables)? My book doesn't explain it in a way I can understand. Please and thank you.

asked by Caroline on January 24, 2013
10. ### to annonymus can you help me with math

How do i solve inequalitites with three variables. I still can't figure it outplease help. x+y=1 y-z=-3 2x+3y+z=1 the answers are 3,-2,1 how do get there by solving linear equations with three variables. 5x-2y-z=2 -y+2z=11

asked by Jasmine202005 on October 22, 2006

More Similar Questions