Solve the system.

2x + y = 3

-2y = 14 - 6x

The answer is - 4x+3y = - 11 because you would flip the - 6x over with the - 2y and the equations would look like this

2x+y=3

6x-2y=14

Then the 6x and 2x would turn into a - 4x and the - 2y and y would turn into 3y and the 14 and 3 would turn into a - 11