SOLUTION: what is the solution set of: x+y=3 x-y=-1 and what is the sol set of 3x=y+2 x=y+4

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Question 622942: what is the solution set of:
x+y=3
x-y=-1
and what is the sol set of
3x=y+2
x=y+4
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

 x+y = 3

 x-y = -1           |Adding the EQuations to eliminate the y variable

 2x = 2

  x = 1  and y = 2    (1 + y = 3) 

Ordered pair(1,2)  the solution for this System of Equations

3x=y+2

 x=y+4

3(y+4) = y+2             ||  Substituting (y+4)  for x

 3y + 12 = y + 2

  2y = -10

   y = -5   and x = -1

Ordered pair(-1,-5)  the solution for this System of Equations