Another equation problem

harleysportster
atheist
harleysportster's picture
Posts: 3203
Joined: 2010-10-17
User is offlineOffline
Another equation problem

 My teacher is a prick and I have not been to school in almost  17 years. I couldn't find the answer on Google or Wolfram, so I was hoping the more mathematically inclined could help me :

-19 = 3 + 4x  they want the answer "simplified" as much as possible. 

Damn, I always hated math. I was never any good at it. 

“It is proof of a base and low mind for one to wish to think with the masses or majority, merely because the majority is the majority. Truth does not change because it is, or is not, believed by a majority of the people.”
― Giordano Bruno


harleysportster
atheist
harleysportster's picture
Posts: 3203
Joined: 2010-10-17
User is offlineOffline
Correction

 They want to know what the x stands for, in other words x=  


x
Bronze Member
Posts: 591
Joined: 2010-06-15
User is offlineOffline
Equations

harleysportster wrote:

 

-19 = 3 + 4x  they want the answer "simplified" as much as possible. 

 

Get all the constants together, so subtract 3 from both sides:

-19 - 3 = 4x

which is the same as

-22 = 4x

then isolate x by dividing each side by 4

-22/4 = x

so x = -11/2 or -5.5

 

In general, everything done to the left hand side (of =) has to be done to the right hand side.

 

 To check that it has been done properly, plug the solution back in:

-19 = 3 + 4x

where x = -5.5

 

so

-19 = 3 + (4 * -5.5)

-19 = 3 + (-22)

-19 = 3 - 22

which is true, so the answer is right.


Vastet
atheistBloggerHigh Level ModeratorSuperfan
Vastet's picture
Posts: 10355
Joined: 2006-12-25
User is offlineOffline
I verify this answer.

I verify this answer.

Proud Canadian, Enlightened Atheist, Gaming God.


harleysportster
atheist
harleysportster's picture
Posts: 3203
Joined: 2010-10-17
User is offlineOffline
Thanks but

 Thanks but what does the x stand for ? 5.5. ?


harleysportster
atheist
harleysportster's picture
Posts: 3203
Joined: 2010-10-17
User is offlineOffline
Thanks but

 So, the answer is x= -5.5 ? Is that right ?


tonyjeffers
tonyjeffers's picture
Posts: 482
Joined: 2012-02-14
User is offlineOffline
harleysportster wrote: So,

harleysportster wrote:

 So, the answer is x= -5.5 ? Is that right ?

yes


harleysportster
atheist
harleysportster's picture
Posts: 3203
Joined: 2010-10-17
User is offlineOffline
tonyjeffers

tonyjeffers wrote:

harleysportster wrote:

 So, the answer is x= -5.5 ? Is that right ?

yes

 

and that would be in the most simplified form correct ?

“It is proof of a base and low mind for one to wish to think with the masses or majority, merely because the majority is the majority. Truth does not change because it is, or is not, believed by a majority of the people.”
― Giordano Bruno


tonyjeffers
tonyjeffers's picture
Posts: 482
Joined: 2012-02-14
User is offlineOffline
harleysportster

harleysportster wrote:

tonyjeffers wrote:

harleysportster wrote:

 So, the answer is x= -5.5 ? Is that right ?

yes

 

and that would be in the most simplified form correct ?

correct

"...but truth is a point of view, and so it is changeable. And to rule by fettering the mind through fear of punishment in another world is just as base as to use force." -Hypatia


tonyjeffers
tonyjeffers's picture
Posts: 482
Joined: 2012-02-14
User is offlineOffline
if you need to brush up on

if you need to brush up on your algebra skills, start with the simplest basics with an equation that has even numbers and no negatives. Then everything will make more sense after that.  like:

 

   2x + 4 = 24              answer    x = 10

 

then move up to :

 

   2x + 4 = 25              answer   x = 10.5

"...but truth is a point of view, and so it is changeable. And to rule by fettering the mind through fear of punishment in another world is just as base as to use force." -Hypatia


harleysportster
atheist
harleysportster's picture
Posts: 3203
Joined: 2010-10-17
User is offlineOffline
Thanks for the help

 Thanks for the help guys. I appreciate it.