sakinaray sakinaray
  • 04-11-2020
  • Mathematics
contestada

Solve the system of equations x+y=-1 and 5x-7y=79 by combining the equations.

Respuesta :

sqdancefan
sqdancefan sqdancefan
  • 04-11-2020

9514 1404 393

Answer:

  (x, y) = (-6, -7)

Step-by-step explanation:

Multiply the first equation by 7 and add that to the second.

  7(x +y) +(5x -7y) = 7(-1) +(79)

  12x = 72

  x = 6

  y = -1 -x = -1 -6 = -7

The solution is (x, y) = (6, -7).

Ver imagen sqdancefan
Answer Link

Otras preguntas

why is prior knowledge do important in science
solve the equation 5 x - 14 = x - 7. in your final answer, be sure to state the solution and include all of your work.
list the functions of the 4 macromolecules?
Victoria enjoys laughing with her friends as they walk around the track after school. Which best describes their heart rates during this activity? (10 points) V
How many gallons of water are in earths oceans?
Choose the correct english for los tiburones viven en el océano
if 12 pencils cost $1.92 find the cost of 1 pencil
why was the kaaba significant for mecca
what advantages did daniel morgan's riflemen have?
The enrollment at a university increased from 8000 students in 2001 to 12,000 students in 2002. what is the percent increase in enrollment? a. 5% b. 10% c. 2