jeremiahwebster74 jeremiahwebster74
  • 12-05-2020
  • Mathematics
contestada

3x + 5y = -27
|-7x - 5y = 3

Respuesta :

sqdancefan
sqdancefan sqdancefan
  • 12-05-2020

Answer:

  (x, y) = (6, -9)

Step-by-step explanation:

Add the two equations to eliminate the y-variable:

  (3x +5y) +(-7x -5y) = (-27) +(3)

  -4x = -24 . . . simplify

  x = 6 . . . . . . divide by -4

Substitute this value of x into the first equation and solve for y:

  3(6) +5y = -27

  5y = -45 . . . . . . . subtract 18

  y = -9 . . . . . . . . . divide by 5

The solution to this system of equations is (x, y) = (6, -9).

Answer Link

Otras preguntas

Please order -4 1/2,5.6,-2 3/8, and 1.35
Which of the following best defines diction? A. simile B. symbolism C. word choice D. dialogue
A quantity that has magnitude only is a _____. scalar diagonal vector
How do I find X for 3x-7=5x-13?
If you can buy 4⁄5 of a pound of ham for 3 dollars, how much can you purchase for 10 dollars? Write your answer as a fraction of a pound.
Why can light NOT escape a black whole?
Write the equation that shows how ADP is changed into ATP?
Round this weights to one decimal place 31.61 kg 2.25 kg. 23.29 g Can you help me guys with this question?
Kat’s grades were so good that she was already ________ herself as class valedictorian?
Which conflict from The Tragedy of Julius Caesar is not an example of external conflict? A)Brutus and Cassius’ argument about bribes B)Octavius and Mark Antony’