megan219crane megan219crane
  • 10-11-2021
  • Mathematics
contestada

4x-5y=12, 6x+10y=18: solve by addition method

Respuesta :

lotusjayden lotusjayden
  • 10-11-2021

Answer:

x = 3 , y= 0

Step-by-step explanation:

Answer Link
Paounn
Paounn Paounn
  • 10-11-2021

Answer:

[tex]x=3[/tex];[tex]y=0[/tex]

Step-by-step explanation:

Double the first one, and add it to the second, to get rid of y

[tex]2I + II :8x -10y +6x -10y = 24+18\\14x = 42 \rightarrow x=3\\[/tex]

For the second value, let's take 3 times the first, subtract twice the second, and solve:

[tex]3I-2II: 12x-15y-(12x+20y)=36-36\\-15y-20y=0 \rightarrow -45y=0 \rightarrow y=0[/tex]

Answer Link

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