Question

8) se x+y= 11 e 2 y = 6 qual e o valor de x

Answer 1

x + y = 11

2y = 6

y = 6/2

y = 3

x + y = 11

x + 3 = 11

x = 11 - 3

x = 8

Resp.: x = 8 e y = 3

Answer 2

Vamos lá

x + y = 11   (I)

2y = 6       (II)

de (II) vem

y = 6/2 = 3

de (I) vem

x + 3 = 11

x = 11 - 3 = 8

S = (8, 3)