I problema;
g-grau
o-orz
p-porumb
g+o+p=968 t
o=g/2+19 t
p=o+58 t=g/2+19 t+58 t=g/2+77 t
inlocuim ce cunoastem in prima relatie:
g+g/2+19 t+g/2+77t=968 t(INMULTIM TOATA RELATIA CU 2 PT. A SCAPA DE LINIA DE FRACTIE)
=>2g+g+38 t+g+154 t=1936 t
4g+192 t=1936 t
4g=1936 t-192 t
4g=1744 t
g=1744 t/4=436 t
o=g/2+19 t=436 t/2+19 t=218 t+19 t=237 t
p=o+58 t=237 t+58t=295 t
a II-a problema:
x+y+z+t=1370
x/y=4 r.12=>x=4*y+12
y=z/3=>z=3*y
t=succesorul par al nr 612=614
inlocuim in prima relatie:
4*y+12+y+3*y+614=1370
8*y+626=1370
8*y=1370-626
8*y=744
y=744/8=93
x=4*y+12=4*93+12=384
z=3*y=3*93=279