Question

1) Resolva os sistemas de Equações pel
x + y = 11
x - y = 3
a)​

Answer 1

$x+y=11\ \ \ \ x-y=3\\\\x+x=11+3\\2x=14\\x=14/2\\x=7\\\\x+y=11\\7+y=11\\y=11-7\\y=4\\\\Prova\ real\\x+y=11\\7+4=11\\11=11\ \ \checkmark\\\\x-y=3\\7-y=3\\-y=3-7\\-y=-4\\y=4\\\\prova \ real\\x-y=3\\7-4=3\\3=3\ \checkmark \\\\|\underline{\overline{\mathcal{\boldsymbol{\LaTeX}}}}|$

Resposta;

x = 7

y = 4