Question

X - Y = 1
X + Y = 11

Me ajudem, é urgente !!!

Answer 1

resolução!

x - y = 1

x + y = 11

2x = 12

x = 12/2

x = 6

y = 11 - x

y = 11 - 6

y = 5

S = { X = 6 e Y = 5 }

Answer 2

Resposta:

$~~~~~~~~x-y=1~......equacao~I\\+~~~~~x+y=11~......~equacao~II~~~~~~~~~~~~metodo~da~adicao\\~~~~~~~~------\\~~~~~~~~2x+0=12\\ \\2x=12\\ \\x=\frac{12}{2}\\ \\x=6\\ \\substitua~(x=6)~em~uma~das~equacoes\\ \\x-y=1\\ \\6-y=1\\ \\-y=1-6\\ \\-y=-5~~.(-1)\\ \\y=5\\ \\S:~~\left \{ {{x=6;~~y=5}}} \right.$