Răspuns :
(x+5):6=11
x+5=11×6=66
x=66-5=61
acum partea 2 verificarea ipotezei
(61-6):5=11
55:5=11......este posibil
x+5=11×6=66
x=66-5=61
acum partea 2 verificarea ipotezei
(61-6):5=11
55:5=11......este posibil
( a + 5 ) : 6=11
( a + 5) = 11 x 6
a+5=66
a= 66-5
a=61
( a-6 ) : 5=11
(a-6)=5 x 11
a-6=55
a=55+6
a=61
Deci adevarat