Scris conform ordinii operatiilor, asa cum e postat
x+2/7=2
x=2-2/7
x=14/7-2/7
x=12/7 = 1 si5/7
as simple as that!
la scoala primara, eventual explicat cu septimile
x=2-2/7=1+1-2/7=1+7/7-2/7=1+5/7=1si5/7
daca fractia are numaratorul x+2
adica
(x+2)/7=2
atunci avem
(x+2):7=2
x+2=7*2
x+2=14
x=14-2
x=12
