Use The elimination method

a). 2x + 3y = 5

-3 + 2y = - 14

1. Multiply the second equation by 3 so it equals - 9+6y=-42

2. Multiply the first equation by 2 so it equals 4x+6y=10

3. Subtract the second equation from the first so you arrive at 4x+9=-32

4. Solve for x so you arrive at x = (-32-9) / 4 or x = - 10.25

It is worth noting that this is quite the bizarre method, it would be much simpler to solve for y in the second equation and then substitute that in the second equation than using the elimination method.