Question

daca a+d=108 si a-b =42,sa se afle a si b

Answer 1

a+b = 108
a-b = 42 => a = b+42
inlocuim in prima ecuatie pe a
b + 42 + b = 108
2×b = 108 - 42
2×b = 66
b = 66 : 2
b = 33
a = 42+33 = 75

Verificare:
75+33 = 108
75-33 = 42

a = 75
b = 33