robertliana14 robertliana14
  • 08-10-2020
  • Mathematics
contestada

What is the value of y in the following system?

4x - 10y = -3

12x + 5y = 12

Respuesta :

jaimie11121
jaimie11121 jaimie11121
  • 08-10-2020

Y=3/5

First, set it up so they cancel. I recommend multiplying the second equation by 2, getting

[tex]4x-10y=-3[/tex]

[tex]24x+10y=24[/tex]

add them together, and you get

[tex]28x=21[/tex]

so

[tex]x=3/4[/tex]

then, you plug x into one of the equations (first because it's easier) and get

[tex]3-10y=-3[/tex]

so

[tex]-10y=-6[/tex]

and

[tex]y=3/5[/tex]

Answer Link

Otras preguntas

Simplify———(3q+9)^2
what is a layer that surrounds cells, separating their interior from the exterior environment?
Which military action led to the start of World War I?
Who swam the fastest? Tami- 50m freestyle time-40.8 Liam-100m freestyle time-60.2 Ava- 200m freestyle time-112.4 EASY UNIT RATE MATH!!
What multiplies to get -9 and adds to get 0
what properties of a substance determine how that substance will react when combined with another substance
According to Ann Cooper, what specific diseases and health issues are directly caused by poor nutrition and food choices? Do you personally know anyone or have
a suit is on sale for $527, which is 38% less than the regular price. what is the regular price?
Thank you for the help! I would appreciate it if someone could explain this content to me. I need help on both of them. I wish to understand the content and hav
Which of the following U.S officials truly enforced the relocation of native Americans