anonymous
  • anonymous
use the echelon method to solve system of equalities X+y=10 5x-y=44
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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Shayaan_Mustafa
  • Shayaan_Mustafa
hello tishagwen. are you there?
Shayaan_Mustafa
  • Shayaan_Mustafa
hello mr.
anonymous
  • anonymous
sorry yea im here

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anonymous
  • anonymous
and its mrs.. ")
Shayaan_Mustafa
  • Shayaan_Mustafa
oh .. hehehehhehe... mrs. or right. let us solve it. Well I don't know how to use arrays on this site. so kindly. try to understand me.
anonymous
  • anonymous
the problem changed sorry
Shayaan_Mustafa
  • Shayaan_Mustafa
yes. what is it?
anonymous
  • anonymous
X+y=10 5x-y=44
Shayaan_Mustafa
  • Shayaan_Mustafa
miss it is the same question that you've posted.
anonymous
  • anonymous
if i understand right.. ill need to take the first set and multiply by 5 and the the 2nd one multiply by-1 right?
Shayaan_Mustafa
  • Shayaan_Mustafa
no no. here you are solving the equation with Gauss elimination method(Echelon form).
anonymous
  • anonymous
oh ok
Shayaan_Mustafa
  • Shayaan_Mustafa
so first write equation as matrices form. 1 1 10 5 -1 44 OK?
anonymous
  • anonymous
got it
Shayaan_Mustafa
  • Shayaan_Mustafa
ok now Replace row 2 (i.e. R2) with the row operation R2 new=-4*R1+R2 in order to convert some elements in the row into the desired value 0.
Shayaan_Mustafa
  • Shayaan_Mustafa
do this step. then tell me.
anonymous
  • anonymous
x-5y=-34
Shayaan_Mustafa
  • Shayaan_Mustafa
no no my dear.
Shayaan_Mustafa
  • Shayaan_Mustafa
do the row operation on R2(row 2)
anonymous
  • anonymous
what do you mean
Shayaan_Mustafa
  • Shayaan_Mustafa
means. multiply R1 with 4 and minus it from R2 i.e. R2new=R2-4R1 Does this make sense to you?
anonymous
  • anonymous
not really i know nothing of the matrix stuff
Shayaan_Mustafa
  • Shayaan_Mustafa
now look at pic and here I am going to solve it for you. keep the pic in mind. OK
anonymous
  • anonymous
how did u get 4 i thought it was 5
Shayaan_Mustafa
  • Shayaan_Mustafa
yes yes it is 5 sorry. it is a mistake.
anonymous
  • anonymous
ok
Shayaan_Mustafa
  • Shayaan_Mustafa
step#2) multiply R1 with 5|dw:1332792360847:dw|
Shayaan_Mustafa
  • Shayaan_Mustafa
Did you get step#2?
anonymous
  • anonymous
yes
Shayaan_Mustafa
  • Shayaan_Mustafa
|dw:1332792567385:dw|
Shayaan_Mustafa
  • Shayaan_Mustafa
hello.
Shayaan_Mustafa
  • Shayaan_Mustafa
x+y=10,5x-y=44 Write the system of equations in matrix form. M[1,1,10:5,-1,44] Replace row 2 (i.e. R2) with the row operation R2 new=-5*R1+R2 in order to convert some elements in the row into the desired value 0. M[1,1,10:0,-6,-6] Replace row 2 (i.e. R2) with the row operation R2 new=-(1)/(6)*R2 in order to convert some elements in the row into the desired value 1. M[1,1,10:0,1,1] Replace row 1 (i.e. R1) with the row operation R1 new=-1*R2+R1 in order to convert some elements in the row into the desired value 0. M[1,0,9:0,1,1] Use the result matrix to declare the final solutions to the system of equations. x=9_y=1 This expression is the solution set for the system of equations. (9,1)
Shayaan_Mustafa
  • Shayaan_Mustafa
Here is your all solution. good luck.
anonymous
  • anonymous
would it be 1 0 9 0 1 1
Shayaan_Mustafa
  • Shayaan_Mustafa
yes.
anonymous
  • anonymous
ok, I think i got it now.. thank you so much!
Shayaan_Mustafa
  • Shayaan_Mustafa
you are ever welcome.

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