Question

2020-2019: {2018-2017: [2016-2015: (2014-a)]} = 1 A=? dau coroana !!!!!!! ​

Answer 1

Răspuns:

a = 2013

Explicație pas cu pas:

2020 - 2019:{2018 - 2017:[2016 - 2015:(2014 - a)]} = 1

2020 - 1 = 2019:{2018 - 2017:[2016 - 2015:(2014 - a)]}

2019 = 2019:{2018 - 2017:[2016 - 2015:(2014 - a)]}

2018 - 2017:[2016 - 2015:(2014 - a)] = 2019:2019

2018 - 2017:[2016 - 2015:(2014 - a)] = 1

2018 - 1 = 2017:[2016 - 2015:(2014 - a)]

2017 = 2017:[2016 - 2015:(2014 - a)]

2016 - 2015:(2014 - a) = 2017:2017

2016 - 2015:(2014 - a) = 1

2016 - 1 = 2015:(2014 - a)

2015 = 2015:(2014 - a)

2014 - a = 2015:2015

2014 - a = 1

2014 - 1 = a  

a = 2013