11x/56 =grau
13x/56 =porumg
x/7 = floarea soarelui
restul legume
x -(11x/56+13x/56+x/7 )= ( numitor 56)
56x/56 -(11x/56+13x/56+8x/56 )=
56x/56-32x /56 =24x/56 =3x/7 suprafata cultivata cu legume
11x/56+13x/56 =24x/56 =3x/7 '' '' '' cugrau+porumb
verif ; 3x/57+x/7+3x/7 =7x/7 =x (intreaga suprafata cultivata )