Răspuns :
a+b=121 a=121-b
a/3+b-3=54
a+3b=54x3=171
121-b+3b=171
2b=50
b=50/2=25
a=121-25=96
verificare 96/3 +25-3=54
a/3+b-3=54
a+3b=54x3=171
121-b+3b=171
2b=50
b=50/2=25
a=121-25=96
verificare 96/3 +25-3=54
a+b=121 sau a=121-B
a/3+b-3=54
a+3b=54x3=171
121-b+3b=171
2b=50
b=50/2=25
a=121-25=96
a/3+b-3=54
a+3b=54x3=171
121-b+3b=171
2b=50
b=50/2=25
a=121-25=96