(x+20):12+68=78 scuzatima


Răspuns :

(x+20):12=78-68
               =10
x+20=10x12
x+20=120
x=120-20
x=100
(X+20):12+68=78
(X+20):12=78-68
(X+20):12=10
X+20=10×12
X+20=120
X=120-20
X=100


Sper că te-am ajutat! :)