👤

a+(4/9-1/9)=1 Cat e a


Răspuns :

a+3/9=1 amplificam cu 9
9a+3=9
a=6/9=2/3
a+(4/9-1/9)=1
a+3/9=1
a+1/3=1
a=1-1/3
a=3/3-1/3=2/3=0,(6)