Răspuns :
5²°(5²+5+1)/60=(5²)¹⁰/x
5²⁰·31/60=5²⁰/x
5²⁰·31x=5²⁰·60
x=(5²⁰·60)/(5²⁰·31)
x=60/31
5²⁰·31/60=5²⁰/x
5²⁰·31x=5²⁰·60
x=(5²⁰·60)/(5²⁰·31)
x=60/31
5²⁰(5²+5¹+1)/60=(5²)¹⁰/x
5²⁰×(25+5+1)/60=5²⁰/x
5²⁰×31/60=5²⁰/x
x=5²⁰×60/5²⁰×31
x=60/31
5²⁰×(25+5+1)/60=5²⁰/x
5²⁰×31/60=5²⁰/x
x=5²⁰×60/5²⁰×31
x=60/31