anonymous
  • anonymous
Two lines, A and B, are represented by the equations given below: Line A: x + y = 2 Line B: 2x + y = 4 Which statement is true about the solution to the set of equations? There are infinitely many solutions. There are two solutions. There is one solution. There is no solution.
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
anonymous
  • anonymous
anonymous
  • anonymous
is it one solution?

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anonymous
  • anonymous
thanks!!! @Sachintha
anonymous
  • anonymous
Please don't give out direct answers… it's against the CoC. @Sachintha
anonymous
  • anonymous
Try explaining it.
Sachintha
  • Sachintha
Anyway my answer is wrong :D
anonymous
  • anonymous
so one solution?
anonymous
  • anonymous
huh?
Sachintha
  • Sachintha
How did you get it?
anonymous
  • anonymous
guessed lol
Sachintha
  • Sachintha
Subtract equation A from B so that you can get a value for x.
anonymous
  • anonymous
-2
Sachintha
  • Sachintha
Nope. \[2x+y-(x+y)=4-2\] \[2x+y-x-y=2\] \[x=2\]
anonymous
  • anonymous
ohhh... so its one solution?
Sachintha
  • Sachintha
For y you just substitute the value for x.
Sachintha
  • Sachintha
Yeah :)
anonymous
  • anonymous
thanks so much

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