Question

Which is the solution of the following system of equations: 2x + y = 4 3x – y = - 14

Answer 1

`2x + y = 4 \\ 3x - y = - 14`

Lets add 2 equations

`5x = - 10 \\ x = - 2`

Now we need to put x into any equation

`2 * ( - 2) + y = 4 \\ - 4 + y = 4 \\ y = 8`

Answer: (-2; 8)