identify the solutions

Question

2x+y=1     &      x-y=3

Answer 1

2x + y = 1

 

x - y = 3

 

you can add  equation 2 and 1

 

2x + y = 1

 x - y = 3

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3x + 0 = 4

 

3x =4

x =3/4

 

plug in 3/4 for x in any of the equations to get a value for y

 

2x + y =1

 

2(3/4) + y =1

 

3/2 +  y = 1

 

y = 1 - 3/2

 

y = - 1/2