for sumaltanaous equation you add when the signs are different hover when they are the same signs what do you do ?

  • 0 votes

helpppp g

Posted Mon 6th June, 2011 @ 00:21 by lucy

3 Answers

  • 1 vote

okay when the signs are different ADD but when the same TAKE AWAY :)

Answered Mon 6th June, 2011 @ 08:30 by Hannah
  • 0 votes

you could make 2 of the values the same and then subtract,

e.g. A- 2a + 3b = 12 and B- 2a + 5b = 18     B-A   2b = 6

then substitute in the answer :) hope that helpful, don't know if thats what you were looking for?

Answered Mon 6th June, 2011 @ 00:57 by Pandora Lusby
  • 0 votes

take the second equation away from the first =D

Answered Mon 6th June, 2011 @ 18:12 by olivia