Ilovebaby Ilovebaby
  • 18-08-2020
  • Mathematics
contestada

solve the system by adding or subtracting
-3x-3y=9
3x+8y=6

Respuesta :

CoalitionStorm
CoalitionStorm CoalitionStorm
  • 18-08-2020

Answer:

x = -6 y = 3

Step-by-step explanation:

Adding the two equations and you get, -3x-3y + 3x+8y= 6+9

=> 5y = 15

=> y = 3

Plug y in each equation

-3x -3(3) = 9

-3x -9 = 9

-3x = 18

x = -6

3x + 8(3) = 6

3x +24 = 6

3x = -18

x = -6

Answer Link

Otras preguntas

What keeps a cell from getting too big
How to factor out the coefficient of 9x-36
In what order did the following civilizations arise Aztec,inca,maya,Olmec
Which of the following words can be used as a noun? A. Happily B. Love C. If D. Younger
How do financial imstitutions help cities,towns, and communities?
Janelle buys a dining table on a 15% discount during a sale. If the price was $80, how much did she pay?
what is 107,609 ÷ 72 and what is 9,317 ÷ 95
What is the answer to -2(4-m)=10
Which one of the following reactions occurs in the cristae of the mitochondria? a. Glycolysis b. The citric acid cycle c. The electron transport chain d. Th
Which function are local governments responsible for meeting? A.national security B.education C.space exploration D.mail delivery