Question

$x + y = 18 \\ y = 4 \\ 5\ \\ x$
​

Answer 1

Resposta:

$(x,y)=(14,4)$

Explicação passo-a-passo:

$\left \{ {{x+y=18} \atop {y=4}} \right. \\x+4=18\\x=14\\(x,y) = (14,4)\\\left \{ {{14+4=18} \atop {4=4}} \right.\\\left \{ {{18=18} \atop {4=4}} \right. \\(x,y)=(14,4)$