Question

Solve. 2x+y=7,x-y=1
Please help ​

Answer 1

Answer:

The value of x = 8/3 and the value of y = -5/3.

Step-by-step explanation:

Equation 1.

2x + y = 7 - - - - - - - 1.

Equation 2.

x - y = 1 - - - - - - 2.

By elimination method :

Multiply equation 2. by ( -1)

( x - y = 1 ) x ( -1 )

-x + y = -1  - - - - - - - 3.

Subtracting equation 1. and equation 3. :

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

3x + y + x - y = 7 + 1

3x = 8

x = 8/3

Put the value of x = 8/3 in equation 2.

x - y = 1

8/3 - y = 1

-y = 1 - 8/3

-y = -5/3

y = 5/3

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