Răspunsuri

2014-06-03T14:21:51+03:00
X- numar
2x-56=0
2x=56
x=56:2
x=28
2014-06-03T14:21:54+03:00
Notam numarul cu x
2x-56=0
2x=0+56
2x=56
x=56:2
x=28(numarul)