cjoey2757 cjoey2757
  • 22-05-2020
  • Mathematics
contestada

Solve the system of equations 4x+y=-10 and 9x+y=-15 by combining the equations.

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wegnerkolmp2741o
wegnerkolmp2741o wegnerkolmp2741o
  • 22-05-2020

Answer:

x=-1, y= -6

Step-by-step explanation:

4x+y=-10

9x+y=-15

Subtract the second equation

4x+y=-10

-9x-y=15

---------------------

-5x    = 5

Divide each side by -5

-5x/-5 = 5/-5

x = -1

Now find y

4x+y = -10

4(-1) +y = -10

-4+y = -10

Add 4 to each side

-4+4 +y = -10+4

y = -6

Answer Link
amna04352
amna04352 amna04352
  • 22-05-2020

Answer:

(-1,-6)

Step-by-step explanation:

y = -10-4x

y = -15-9x

-10-4x = -15-9x

5x = -5

x = -1

y = -15-(-9) = -6

Answer Link

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