HI Guys, Can any body solve these simultaneous equations: 2a + 3(a-b) = 7 4b + 3(b-a) = 1 If anybody could show me how to do these that would be great !! Thanks!
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Originally Posted by sparkdog HI Guys, Can any body solve these simultaneous equations: 2a + 3(a-b) = 7 4b + 3(b-a) = 1 If anybody could show me how to do these that would be great !! Thanks! Well start by simplifying: and The way I typically solve these is by substitution. For example, solve the bottom equation for a: Then insert this value for a in to the top equation: Now solve this for b and then put that into the "a" equation above. -Dan
Last edited by topsquark; Jan 5th 2008 at 08:39 AM.
Thanks for your help Dan, that great. Im not sure if you have simplified the 2nd equation correct tho. The second equation was 4b + 3(b-a) = 1 you had got it as 4b + (3b - a) = 1. Sorry !
Originally Posted by sparkdog Thanks for your help Dan, that great. Im not sure if you have simplified the 2nd equation correct tho. The second equation was 4b + 3(b-a) = 1 you had got it as 4b + (3b - a) = 1. Sorry ! Whoops! A typo that I carried through. Thanks for the catch. -Dan
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