davan8122 davan8122
  • 02-08-2022
  • Mathematics
contestada

x+2y=5 and 4x+12y=-20 elimination method

Respuesta :

bunnuika
bunnuika bunnuika
  • 02-08-2022

Answer:

x=25 and y=-10

Step-by-step explanation:

x+2y=5 ..........(1)

4x+12y=-20.........(2)

using elimination method.

multiply equ(1) by 4 and equ(2) by 1

so we have

x+2y=5..........*4

4x+12y=-20.........*1

4x+8y=20................(3)

4x+12y=-20.............(4)

subtract eq(4) from (3) we have

-4y=40

y=-10

substitute y=-10 in equation (1)

we have:

x+2(-10)=5

x-20=5

x=25

Answer Link

Otras preguntas

i will give Brainliest to the first person!!! plzzzz helpppp meeeee
Lucie is struggling with Geometry and is in need of a private tutor. She has two candidates in mind. The veteran tutor charges $15 for the first session plus $6
(six to the -4th power Times eight to the -7th power )-7 =?
Write the number equal to 2 tens 15 ones.
In what form is energy stored at the end of photosynthesis? O A. Water energy O B. Electron energy O C. Chemical energy O D. Solar energy Will mark brainliest
Find each quotient. pls help its easy
the world's tallest mountain, if measured from base to peak, is Mauna Kea in Hawaii. The base has an elevation of -19680 feet. The peak has an elevation of 1379
In what order would we solve for n? 3n - 4 = 14
What continent is also a country
what might cause a change in the value of fiat money?