Question

algebra com duas igonitas

 

Answer 1

 

 

x + y = 3

x - y  = 1

 

 

2x = 4

 

x = 4/2  ==> x = 2

 

 

x + y = 3

 

2 + y = 3

 

y = 3 - 2 

 

y = 1