Question

a+b=3
2a+b=5

Ajudem ai pfvr galera

Answer 1

Eaew!!!


a + b = 3
2a + b = 5
----------------
b = 3 - a

2a + b = 5
2a + 3 - a = 5
2a - a = 5 - 3
a = 2

b = 3 - a
b = 3 - 2
b = 1



S={ 2, 1 }