could someone explain how you treat a circuit with two cells in respect to circuit laws.
I can explain how you treat a linear circuit with two voltage sources. Your circuit is a linear circuit because it contains nothing but linear components.
With a linear circuit, you can solve the currents caused by each individual source by "nulling out" all of the others. If you do that for each source, then the total current in each resistor will simply be the sum of the currents caused by each individual source.
The "cells" in your circuit are voltage sources. They force a particular voltage between two points without restricting the current at all. So, to "null out" a voltage source, you want force 0V between the same two points without preventing current. In other words, replace the cell with a wire.
So, first, replace the left cell with a straight wire, and figure out the current that will be forced through each resistor by the right hand cell. Then replace the right hand cell with a straight wire, and figure out the currents that are forced by the left hand cell. Then, compute the total current in each resistor by adding the current due to the left cell and the current due to the right cell.
Pay attention to the signs! When a source causes current to flow in the same direction as the arrow on a resistor symbol, you'll want to record a positive number. If the source forces current to flow opposite of the direction that the arrow is pointing, then you'll write down a negative number.
Finally, knowing the current in each resistor, you can use Ohm's Law to compute the voltage across each resistor.