Răspuns :
b = a + 2
c = b + 12
a + a + 2 + b + 12 =625
a + a + 2 + a + 2 + 12 = 625
3a + 16 = 625
3a = 625 - 16
3a = 609
a = 609 : 3
a = 203
b = a + 2
b = 203 + 2
b = 205
c = b + 12
c = 205 + 12
c = 217
verificam
203 + 205 + 217 = 625
c = b + 12
a + a + 2 + b + 12 =625
a + a + 2 + a + 2 + 12 = 625
3a + 16 = 625
3a = 625 - 16
3a = 609
a = 609 : 3
a = 203
b = a + 2
b = 203 + 2
b = 205
c = b + 12
c = 205 + 12
c = 217
verificam
203 + 205 + 217 = 625
A+B+C=625 625-A=2 B-623=2 625-C=12
B-A=2 A=625-2 B=623+2 C=625-12
B-C=12 A=623 B=625 C=613
B-A=2 A=625-2 B=623+2 C=625-12
B-C=12 A=623 B=625 C=613