hannah12longo26 hannah12longo26
  • 14-12-2020
  • Mathematics
contestada

Solve using substitution and show your work:
-3x-3y=3
y=-5x-17

Respuesta :

DannyCoolGuy
DannyCoolGuy DannyCoolGuy
  • 14-12-2020

Answer:

Step-by-step explanation:

Isolate any variable, x or y, but since y has already been isolated, use y to solve for x.

Substitute y into the first equation -3x-3y=3

This equals -3x - 3 (-5x - 17) = 3

Distribute to get -3x + 15x + 51  = 3

Then bring like terms together. -3x + 15x = 3 - 51

12x = -48

Solve for x

x = -4

Substitute -4 for x in the equation: y = -5x - 17

y = − 5x − 17

y = (−5) (−4) − 17

y = 20 - 17

y = 3 ( Simplify both sides of the equation)

Answer:

x = − 4 and y = 3

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