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anonymous
 one year ago
Please help me figure out elimination I am so confused? Use elimination to solve the following system of equations.
4x+y+3z=0
2x2yz=10
3x2y+2z=11
anonymous
 one year ago
Please help me figure out elimination I am so confused? Use elimination to solve the following system of equations. 4x+y+3z=0 2x2yz=10 3x2y+2z=11

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0videos online make no sense to me :(

texaschic101
 one year ago
Best ResponseYou've already chosen the best response.0these are not hard...but they are very time consuming and if you make a mistake at the beginning of the problem, it will carry through to the end and you will get it wrong...so it is also important to check your work when you are finished. first take 2 of the equations (any two) and eliminate a variable 3x  2y + 2z = 11 (multiply everything by 1...we are eliminating y) 2x  2y  z = 10  3x + 2y  2z = 11 (result of multiplying by 1) 2x  2y  z = 10 add x  3z = 1 you understand so far ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yes kind of. so what do i do with x3z=1 ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0like my answer has to be an ordered triple like (2,3,4) for example?

texaschic101
 one year ago
Best ResponseYou've already chosen the best response.0Set that first part aside for now... now take 1 of the equations you used and the one that you haven't used yet...and eliminate y. You always have to eliminate the same variable as you did in the first part. 4x + y + 3z = 0  multiply by 2 2x  2y  z = 10  8x + 2y + 6z = 0 (result of multiplying by 2) 2x  2y  z = 10 add 10x + 5z = 10 any questions so far ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok so what do i do with 10x + 5z = 10 and x  3z = 1 ?

dinamix
 one year ago
Best ResponseYou've already chosen the best response.0@texaschic101 we have two method , (method gauss ) or (method cramer) we can use to find it

dinamix
 one year ago
Best ResponseYou've already chosen the best response.0did u study method cramer in algebra ?

dinamix
 one year ago
Best ResponseYou've already chosen the best response.0i mean matrix and this things

texaschic101
 one year ago
Best ResponseYou've already chosen the best response.0hold on...I am not getting the right answer....let me try again 2x  2y  z = 10  multiply by 1 3x  2y + 2z = 11  2x + 2y + z = 10 (result of multiplying by 1) 3x  2y + 2z = 11 add x + 3z = 1 3x  2y + 2z = 11 4x + y + 3z = 0  multiply by 2  3x  2y + 2z = 11 8x + 2y + 6z = 0 add 11x + 8z = 11 now take your results and eliminate a variable x + 3z = 1  multiply by 11 11x + 8z = 11  11x  33z = 11 11x + 8z = 11  25z = 0 z = 0 now take one of the equations you eliminated y out of and sub in 0 for z x + 3z = 1 x + 3(0) = 1 x = 1 now take one of your original equations and sub in x and z to find y 2x  2y  z = 10 2(1)  2y 0 = 10 2  2y = 10 2y = 10  2 2y = 8 y = 4 now we check... 3x  2y + 2z =11 3(1)  2(4) + 2(0) = 11 3 + 8 + 0 = 11 11 = 11 (correct) answer is (1,4,0)

texaschic101
 one year ago
Best ResponseYou've already chosen the best response.0sorry about that....do you have questions ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0that explained it absolutely perfectly! thank u so much! just got a 100 on my test lol I was waiting just for that one question bc I didn't get it!

texaschic101
 one year ago
Best ResponseYou've already chosen the best response.0congrats on the test. This is probably not the easiest way to get the answer...I am just not too good with matrices
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