Question

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Answer 1

x= 8-2y

2×(8-2y)-y= 6
16-4y-y= 6
-5y= 6-16
-5y= -10 . (-1)
y= 10/5
y= 2.

x= 8-2y
x= 8-2×(2)
x= 8-4
x= 4.


$valor \: de \: x {}^{y} - 1 \\ 4 {}^{2} - 1 \\ 16 - 1 \\ 15.$

R= Letra A.

Answer 2

{x+2y=8
{2x-y=6

x=8-2y
2(8-2y)-y=6
16-4y-y=6
-5y=6-16
-5y=-10 (-1)
5y=10
y=10/5
y=2

x=8-2y
x=8-2.2
x=8-4
x=4

(x,y) = (4,2) logo,

x^y-1
4^2-1
16-1
15

Resposta Letra A, 15