👤

(2supra3+x)•30supra13=2

Răspuns :

(2/3+x)•30/13=2
2/3+x=2:30/13
2/3+x=2•13/30
2/3+x=13/15
x=13/15-2/3
x=13/15-10/15
x=(13-10)/15=3/15=1/5