Question

Jamie spent a total of 11.60 on 5 identical pens and a ruler. a ruler costs $ 1.30 less than a pen. how much a pen cost? can you show me how to solve that maths

Answer 1

5*Pen+ruller=11.60
ruler=Pen-1.30
5Pen+Pen-1.30=11.60
Pen=12.90/6=2.15