Question

यदि x+y 19 और x-y 7 है तो x-y? ​

Answer 1

Answer:

{x,y} == {13,6}

Step-by-step explanation:

SYSTEM OF LINEAR EQUATIONS ENTERD: [ 1 ] x + y = 19

[ 2] x - y = 7

Graphic Representation of the Equations :

y + x = 19 y + x = 7

Solve by Substitution :

// Solve equation [2] for the variable  x 

 

[2] x = y + 7

// Plug this in for variable  x  in equation [1]

  [1] (y +7) + y = 19   [1] 2y = 12

// Solve equation [1] for the variable  y 

  [1] 2y = 12    [1] y = 6 

// By now we know this much :

  x = y+7   y = 6

// Use the  y  value to solve for  x 

  x = (6)+7 = 13 

Solution :

 {x,y} = {13,6}