Răspuns :
f + s + b = 961
f + s = 855
s + b = 282
=>
b = 961 - 855 = 106
f = 961 - 282 = 679
s = 961 - ( 106 + 679 ) = 176
f+s+b=961
f+s=855
s+b=282
855+b=961
b=961-855
b=106
s+106=282
s=282-106
s=176
f+176=855
f=855-176
f=679
R:f=679;s=176;b=106.
f+s=855
s+b=282
855+b=961
b=961-855
b=106
s+106=282
s=282-106
s=176
f+176=855
f=855-176
f=679
R:f=679;s=176;b=106.