workbr32
workbr32 workbr32
  • 23-04-2021
  • Mathematics
contestada

Solve the system of equations using subtraction. 2x-4y= -12 2x+y=8 plz help

Respuesta :

rojoe2816
rojoe2816 rojoe2816
  • 23-04-2021

Answer:

x=2, y= 4

Step-by-step explanation:

Equation 1 is 2x-4y = -12

Equation 2 is 2x+y = 8

Subtracting the two equations gives -4y-y = -12-8 (The 2x and the other 2x cancel each other out).

Simplifying we get -5y = -20 and y =4

Substituting y =4 into original equation back we get 2x -4(4) =-12

This equals 2x -16 =-12 and 2x = 4 and x =2

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