cupcake9937
cupcake9937 cupcake9937
  • 17-01-2019
  • Mathematics
contestada

What is the value of w in the solution to the following system of linear equations ?
5v+4w=1
3v-6w=2

A -7/18
B -1/6
C-1/9
D1/3

Respuesta :

hbdasti hbdasti
  • 17-01-2019

Answer:

-1/6

Step-by-step explanation:


Solve one equation for one variable  [tex]v[/tex]  then plug it into the other and solve for the other variable [tex]w[/tex] .

[tex]5v+4w=1\\5v = 1-4w\\v = \frac{1-4w}{5}[/tex]

Now plug [tex]v[/tex] into the second equation:

[tex]\\3(\frac{1-4w}{5}) - 6w = 2\\3(\frac{1-4w}{5}) = 2+ 6w \\\frac{3-12w}{5} = 2+ 6w\\3-12w = 10+ 30w\\-42w = 7\\w = \frac{7}{-42} \\w =-\frac{1}{6}[/tex]

Answer Link
LuhBaby03
LuhBaby03 LuhBaby03
  • 22-10-2020

Answer:

-1/6

Step-by-step explanation:

Answer Link

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