Question

Qual o resultado do sistema 2x menos 2 Y igual a 12 e x + 2y = 11??

Answer 1

2x-2y=12
x+2y = 11

x= 11-2y

2x-2y= 12
2(11-2y) -2y = 12
22-4y-2y = 12
-4y-2y = 12-22
-6y= -10(.-1)
y= 10/6 ou 5/3

x = 11-2.5/3
x = 11-10/3
x = 33-10/3
x = 23/3

s = (23/3 , 5/3)

Answer 2

{2x-2y=12
{x+2y=11
x=11-2y
2(11-2y)-2y=12
22-4y-2y=12
-4y-2y=12-22
-6y=-10
y=-10/-6
y=1,66....
x=11-2×1,66
x=11-3,32
x=7,68
espero ajudar ♥