Răspuns:
Explicație pas cu pas:
1.
3f+5o=280;
3f+2o=184 (-1);
3f+5o-280;
-3f-2o=-184;
3o=96;
o=32;
f=40;
2.
5p+2c=26;
8p+2c=38 (-1);
5p+2c=26;
-8p-2c=-38;
-3p=-12;
p=4;
c=3;
3.
11s+4b=35;
5s+4b=29 (-1);
11s+4b=35;
-5s-4b=-29;
6s=6;
s=1;
b=6;
4.
5p+12s=595;
5p+7s=370 (-1);
5p+12s=595;
-5p-7s=-370;
5s=225;
s=45;
p=11;
5.
4b+2f=22 (-3);
5b+6f=38;
-12b-6f=-66;
5b+6f=38;
-7b=-28;
b=4;
f=3;