Răspuns :
( a x 4 + 51 ) - 303 = 20
a x 4 = 20 + 303 - 51
a x 4 = 323 - 51
a x 4 = 272
a = 272 : 4
a = 68
Succes! :))
a x 4 = 20 + 303 - 51
a x 4 = 323 - 51
a x 4 = 272
a = 272 : 4
a = 68
Succes! :))