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xBabyGirlx

  • one year ago

Using elimination, substitution solve A A. 3x - 9y = 3 6x - 3y = (-24)

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  1. xBabyGirlx
    • one year ago
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    @hereweg0

  2. hereweg0
    • one year ago
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    it belongs in the math section

  3. hereweg0
    • one year ago
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    but okay. 3x - 9y = 3 lets get x alone. 3x=3+9y

  4. xBabyGirlx
    • one year ago
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    yeah i dont care

  5. kasim17
    • one year ago
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    1)Elimination by coefficient method 3x - 9y = 3 .....( i ) 6x - 3y = - 24 ...( ii ) Multiplying ( i ) by 2,we get 6x - 18y = 6 .... ( iii ) Subtracting ( ii ) from ( iii ),we get 6x - 18y = 6 6x - 3y = - 24 (-) (+) (+) --------------------- - 15y = 30 y = - 2 Substituting y = - 2 in ( ii ),we get 6x - 3(- 2) = - 24 6x + 6 = - 24 6x = - 30 x = - 5 x = - 5 and y = - 2 is the solution of given simultaneous equations. 2)Substitution method 3x - 9y = 3 Dividing throughout by 3,we get x - 3y = 1 x = 1 + 3y ..... ( i ) 6x - 3y = - 24 .....( ii ) Substituting ( i ) in ( ii ),we get 6(1 + 3y) - 3y = - 24 6 + 18y - 3y = - 24 15y = - 30 y = - 2 Substituting y = - 2 in ( i ),we get x = 1 + 3y x = 1 + 3(- 2) x = 1 - 6 x = - 5 x = - 5 and y = - 2 is the solution of given simultaneous equations. According to me both the methods are efficient and easy. It varies from individual to individual to decide which method is efficient. So my opinion to you is that learn both the methods and practice hard and try to master them. !!!HOPE I HELPED!!!!

  6. Andy454
    • one year ago
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    belong in math

  7. hereweg0
    • one year ago
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    hmm nice haha

  8. Andy454
    • one year ago
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    this is science....

  9. xBabyGirlx
    • one year ago
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    Thanks kasim17

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