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

$2 \times ( - 2) + y = 4 \\ - 4 + y = 4 \\ y = 8$

Answer: (-2; 8)