Question

resolva os sistemas de primeiro grau..
x+2y=17
x-2y=1

Answer 1

Resposta:

$|x+2y=17|\\|x-2y=01|\\x+x+2y-2y=17+1\\2x=18\\x=\frac{18}{2}\\\boxed{x=9}\\\\x+2y=17\\9+2y=17\\2y=17-9\\2y=8\\y=\frac{8}{2}\\\boxed{y=4}$

Explicação passo-a-passo: