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 one year ago
Solve the system by elimination;
4a  2b + 3c = 10
5a + 2b  2c = 28
3a  2b + c = 22
 one year ago
Solve the system by elimination; 4a  2b + 3c = 10 5a + 2b  2c = 28 3a  2b + c = 22

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timo86m
 one year ago
Best ResponseYou've already chosen the best response.0pic one variable of one equation and solve for it. LIke pick c of bottom most equation and solve for it then plug it into middle equation

ilikequadraticsokay
 one year ago
Best ResponseYou've already chosen the best response.0how do you eliminate the a and b though?

ilikequadraticsokay
 one year ago
Best ResponseYou've already chosen the best response.0i end up with 4a  2b + 3c = 10 5a + 2b  2c = 28 3a  2b + c = 22 4a  2b + 3c = 10 5a + 2b  2c = 28 c = 22 + 3a +2b

kelliegirl33
 one year ago
Best ResponseYou've already chosen the best response.2take the first two equations and add them...this will cancel out the b's

timo86m
 one year ago
Best ResponseYou've already chosen the best response.0wait i was doing substitution sorry @ilikequadraticsokay

timo86m
 one year ago
Best ResponseYou've already chosen the best response.0the link i gave has a great example

kelliegirl33
 one year ago
Best ResponseYou've already chosen the best response.24a  2b + 3c =  10 5a + 2b  2c =  28  9a + c =  38 now take the next two equations and eliminate b. 5a + 2b  2c =  28 3a  2b + c = 22  2a  c =  6 now take the 2 equations you came up with...the ones you cancelled out the b's in. 9a + c =  38 2a  c =  6  11a =  44 a =  4 now sub 4 in for a in either of the above equations 9a + c =  38 9(4) + c =  38  36 + c =  38 c =  38 + 36 c =  2 now sub known values into any of the original equations 4a  2b + 3c = 10 4(4)  2b + 3(2) =  10 16  2b  6 =  10 2b =  10 + 22 2b = 12 b = 6 lets check... 5a + 2b  2c =  28 5(4) + 2(6)  2(2) =  28 20  12 + 4 =  28  32 + 4 =  28  28 =  28 (correct) a = 4, b = 6, c = 2 Is there anything I have just done that you don't understand ? I will be happy to explain it to you.

ilikequadraticsokay
 one year ago
Best ResponseYou've already chosen the best response.0You explained this perfectly, thank you!
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