# Help solving kirchhoff's law for two voltage sources and two resistors in series

I need to find the voltage drop between R1 (4 Ohm) and R2 (2 Ohm). I tried applying Kirchhoff's law in this way: $-10+4I-8-2I=0$ and then solving by $I$ I have $I=9 A$ but that's not correct. Can someone help me?

• What is total voltage? What is total resistance? – Dwayne Reid Feb 26 '17 at 1:01