Hi

3x+y=5  

 x-y=7   x = 

3x+y=5  |Substitute for x

3(7+y) + y = 5

21 + 3y + y = 5

 4y = 5 - 21  |Solving for y

  4y = -16

 y = -4, And...  x = 3 

Ordered Pair (3,-4) is the Solution for this System of EQs

3x+y=5  0r y = -3x + 5  Green

 x-y=7   0r y = x-7  Blue



 

Answer by richwmiller(17219)   (Show Source): You can put this solution on YOUR website!
 What have you tried? What does your book say? 

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