parris548 parris548
  • 23-10-2018
  • Mathematics
contestada

Use substitution to solve the system.

-4x+3y=-11

y=3x-12

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wegnerkolmp2741o
wegnerkolmp2741o wegnerkolmp2741o
  • 23-10-2018

substitute y = 3x-12 into -4x + 3y = -11

-4x +3 (3x-12) = -11

distribute

-4x +9x-36 = -11

combine like terms

5x - 36 = -11

add 36 to each side

5x = 25

divide each side by 4

x = 5

noe we need to find y

y = 3x -12

y = 3(5) -12

  = 15 -12

 y = 3

answer (5,3)

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hmdmkeek
hmdmkeek hmdmkeek
  • 24-10-2018
5,3 is the answer njsjdjjsjs
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