Respuesta :

x=14 over 5 that's the answer I got when I did it on paper
2x + 12 - 7x = -2
1. you can either minus or add 7x to 2x 
2. which gives 9x + 12 = -2 
3. minus 12 on both sides
4. gives you 9x +-14  
5. divided -14 by 9

Answer is -1.55 repeatting