rockinangel1215 rockinangel1215
  • 22-08-2020
  • Mathematics
contestada

4x - y = -7
-8x + 4y = 12
Elimination

Respuesta :

siyunkim88
siyunkim88 siyunkim88
  • 22-08-2020

Answer:

(x,y)=(-2,-1)

Step-by-step explanation:

4x - y = -7: 8x-2y=-14

8x-2y=-14

-8x + 4y = 12

add these two:

2y=-2

y=-1

plug in the y:

-8x-4=12

-8x=16

x=-2

Answer Link

Otras preguntas

A thief tells the truth on Monday, Wednesday & Friday and he lies on the other days. One day the theif said, "I will tell the truth tomorrow". On which day
Which is true about the function below?
Given the circle below with secants PQR and TSR, find the length of PQ. round to the nearest tenth if necessary
what was the impact that the united states had on world war 2?
Sky Learning Task 2: Where do I belong Directions: Classify the given composition if it is a violin and String Music Pian Music and Program Music. Write it on t
please help me! brainliest
Can u help me please?​
x + y = 10 X= ? 10-Y 10 - y-10 y 10
The average winter temperature at the North Pole is greater than -42°F. Which of the following best describes the average temperature? OA. The average temperat
Who was known as “the Great Compromiser”? Henry Clay Daniel Webster John C. Calhoun John Quincy Adams