everimagining
contestada

(PLEASE HELP) (ASKING THE SECOND TIME)

if 7x+ 2y - 6z =12, and if x, y, z are positive, what is the value of 2+z divided by 7x+2y?

a) 1/12
b) 1/6
c) 1/4
d) 5/12

Respuesta :

DeanR

[tex]7x + 2y -6z = 12[/tex]

[tex]7x + 2y = 12 + 6x = 6(2+z)[/tex]

[tex]\dfrac 1 6 = \dfrac{2+z}{7x + 2y}[/tex]

Choice B
7x+2y-6z=12
7x+2y=12+6z
7x+2y=(2+z)6

1/6=(2+z)/(7x+2y)

so answer is 1/6

Otras preguntas