[header] How to solve circuits using kirchhoff's laws [title] Draw the circuit neatly. [step] Label the currents flowing through each branch. For each branch, there should be current' name' and direction. 
[title] At each junction, use kirchhoff's first law to equate the current flowing in to the current flowing out, i.e. [step] Sum of currents flowing into the junction = sum of currents flowing out.