Find the value of y for the following system of equations. - x - y = 7 x - y = 9

y = - 8

Step-by-step explanation:

It is given that,

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

x - y = 9 - - - (2)

To find the solution

Add eq (1) and eq (2) we get

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

x - y = 9 - - - (2)

0 - 2y = 16

y = 16 / (-2) = - 8

Substitute the value of y in eq (1)

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

-x - - 8 = 7

-x + 8 = 7

x = 8 - 7 = 1

Therefore x = 1 and y = - 8