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.Sam. Group TitleBest ResponseYou've already chosen the best response.0
row reduction=elimination?
 2 years ago

m23chris Group TitleBest ResponseYou've already chosen the best response.0
im not exactly sure what you mean
 2 years ago

m23chris Group TitleBest ResponseYou've already chosen the best response.0
im trying to find x and y
 2 years ago

.Sam. Group TitleBest ResponseYou've already chosen the best response.0
http://en.wikibooks.org/wiki/Linear_Algebra/Row_Reduction_and_Echelon_Forms
 2 years ago

shivam_bhalla Group TitleBest ResponseYou've already chosen the best response.0
@.Sam. ,you are right
 2 years ago

.Sam. Group TitleBest ResponseYou've already chosen the best response.0
First make x the same 4x+9y=1 times 3 3x+7y=1 times 4  12x+27y=3 12x+28y=4 ======== y=1 y=1 4x+9y=1 4x+9(1)=1 4x+9=1 Solve for x
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.2
well row reduction deals with matrices and elimination deals with systems of equations, so they're slightly different, but they get you the same answer.
 2 years ago

m23chris Group TitleBest ResponseYou've already chosen the best response.0
i need to solve it using the matrix
 2 years ago

shivam_bhalla Group TitleBest ResponseYou've already chosen the best response.0
see here @m23chris : http://www.math.hmc.edu/calculus/tutorials/linearsystems/
 2 years ago

m23chris Group TitleBest ResponseYou've already chosen the best response.0
we never really did it like this its hard to understand
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.2
4x+9y=1 3x+7y=1 4 9 1 3 7 1 1 9/4 1/4 (1/4)*R1 3 7 1 1 9/4 1/4 0 1/4 1/4 R2  3*R1 > R2 1 9/4 1/4 0 1 1 4*R2 1 0 2 R1  (9/4)*R2 > R1 0 1 1 So the solutions are x = 2 and y = 1
 2 years ago

m23chris Group TitleBest ResponseYou've already chosen the best response.0
so youre dividing by 4 in the first row
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.2
yes in the third step
 2 years ago

m23chris Group TitleBest ResponseYou've already chosen the best response.0
ok i get it now but i have 2 more questions involving 3 rows using the matrix can you help me?
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.2
sure, just make a new question and let me know about it
 2 years ago
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