Răspuns :
a+b=287
a=b/4 +12 4a=b+48 b=4a-48
a+4a-48=287
5a=335
a=67
b=287-67=220
a=b/4 +12 4a=b+48 b=4a-48
a+4a-48=287
5a=335
a=67
b=287-67=220
x+y=287 1/4y+12+y=287 5/4y=275 y=275*4/5 y=220
x=1/4y+12 x=287-220 x=67
67 si 220
x=1/4y+12 x=287-220 x=67
67 si 220