Question

2x+y=-2. x+y=5. the x coordinate of the solution to the system shown is

Answer 1

We have y = -2 - 2x ;
Then, x + ( -2 - 2x ) = 5 ;
x - 2 - 2x = 5;
- x - 2 = 5 ;
-x = 7 ;
x = - 7;
Finally, y = - 2  - 2 × ( - 7 ) ;
y = - 2 + 14 ;
y = 12;
The x coordinate of the solution to the system is - 7 .