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Linear Equation in Two Variables: for class-(ix)

Tapas Dey
17/09/2018 0 0

Check Which of the following are solutions of the equation x-2y=4 and which are not.

i. (0,2) ii. (2,0) iii. (4,0) iv. (1,1)

Ans:

i). (0,2)

Putting x=0, and y= 2 in the L.H.S of the give equation,

x-2y=0-2*2=-4 ≠4

L.H.S≠R.H.S

Therefore, (0,2) is not a solution of this equation.

ii. (2,0)

Putting x=2, and y= 0 in the L.H.S of the give equation,

x-2y=2-2*0=2 ≠4

L.H.S≠R.H.S

Therefore, (2,0) is not a solution of this equation.

iii. (4,0)

Putting x=4, and y= 0 in the L.H.S of the give equation,

x-2y=4-2*0=4 =4

L.H.S=R.H.S

Therefore, (4,0) is a solution of this equation.

iv. (1,1)

Putting x=1, and y= 1 in the L.H.S of the give equation,

x-2y=1-2*1=-1≠4

L.H.S≠R.H.S

Therefore, (1,1) is not a solution of this equation.

 

 

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