Resposta :
Resposta:
( 7 , 5 )
Explicação passo a passo:
[tex]\left \{ {{x-y=2} \atop {x+y=12}} \right. \\\\x -y = 2\\x = 2 +y\\\\\\x + y = 12\\2 + y + y = 12\\2y = 12 - 2\\2y = 10\\y = 10/2\\y = 5\\\\x - y = 2\\x - 5 = 2\\x = 2 + 5\\x = 7[/tex]
Resposta:
( 7 , 5 )
Explicação passo a passo:
[tex]\left \{ {{x-y=2} \atop {x+y=12}} \right. \\\\x -y = 2\\x = 2 +y\\\\\\x + y = 12\\2 + y + y = 12\\2y = 12 - 2\\2y = 10\\y = 10/2\\y = 5\\\\x - y = 2\\x - 5 = 2\\x = 2 + 5\\x = 7[/tex]