Răspuns :
a + b = 36
a = 3×b
3×b + b = 36
4×b = 36
b = 36 : 4
b = 9
a = 36 - 9 = 27
verificare:
27 + 9 = 36
a = 3×b
3×b + b = 36
4×b = 36
b = 36 : 4
b = 9
a = 36 - 9 = 27
verificare:
27 + 9 = 36