Răspuns :
([tex] \frac{x}{3} [/tex] -3)*9=306 (il amplifici pe -3 cu 3)
[tex] \frac{x-9}{3} [/tex] *9=306(numitorul,3,se simplifica cu 9)
(x-9)*3=306
x-9=306/3
x-9=102
x=102+9
x=111
[tex] \frac{x-9}{3} [/tex] *9=306(numitorul,3,se simplifica cu 9)
(x-9)*3=306
x-9=306/3
x-9=102
x=102+9
x=111
Prin metoda inversa!
(x:3-3)x9=306
x:3-3=306:9
x:3-3= 34
x:3=34+3
x:3=37
x=37:3
x=12,(3)
(x:3-3)x9=306
x:3-3=306:9
x:3-3= 34
x:3=34+3
x:3=37
x=37:3
x=12,(3)