Hi

solving by elimination

3x - y = 13 

3x + y = 17



 3x - y = 13 

-3x - y = -17  |subtracting 2nd EQ from 1st EQ to eliminate x

  -2y = -4

    y = 2  and x = 5   (3x-2=13, 3x = 15, x = 5)

CHECKING our Answer***

3x + y = 17

15 + 2 = 17 

Answer by sudhanshu_kmr(1152)   (Show Source): You can put this solution on YOUR website!
 

add both equations,



you will find 6x = 30 , 



or, x = 30/6 = 5



now, put the value of x on first equation, 



3*5 -y = 13



or -y = 13 -15



or y = 2



so, x=5,  y= 2

 

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