Question

1]2x+y=7;4x+y=5 please frainds fadt​

Answer 1

Answer:

Step-by-step explanation:

HOPE THIS HELPS YOU.

Answer 2

Answer:

• x = -1
• y = 9

Explanation:

Given pair of linear equations:

2x+y=7                                           ---------------------(1)

4x+y=5                                           ---------------------(2)

To find:

The solution of the pair of linear equation.

Proof:

2x+y=7                                           ---------------------( 1 )

4x+y=5                                           ---------------------( 2 )

Subtracting equation ( 1 ) from equation ( 2 ), we get:

= 4x + y - (2x + y) = 5 - 7

⇒ 4x + y -2x - y = -2

⇒ 4x -2x + y - y = -2

⇒ 2x= -2

⇒ x = $\frac{-2}{2}$

⇒ x = -1

Substituting the value of x in equation ( 1 ), we get:

= 2x+y=7

⇒ 2 (-1) + y = 7

⇒ -2 + y = 7

⇒ y = 7 + 2

⇒ y = 9

Hence, proved.

Hope you got that.

Thank You.