dudleyvincent02 dudleyvincent02
  • 14-12-2021
  • Mathematics
contestada

Solve the system of equations.
7x - 3y = 20
Y = 5x - 4

Respuesta :

osakings641
osakings641 osakings641
  • 14-12-2021

Answer:

x= -1

y= -9

Step-by-step explanation:

7x-3y=20 × -1 ......(1)

-5x+y=-4 × +3.......(2)

7x-3y=20

-15x+3y=-12

__________

-8x =8

x= 8 ÷ -8 = -1

x= -1

putting x into equation 2

y = 5x-4

y =5(-1) - 4

y = -5 - 4

y = -9

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