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xBabyGirlx

  • 2 years ago

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

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  1. xBabyGirlx
    • 2 years ago
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    @hereweg0

  2. hereweg0
    • 2 years ago
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    it belongs in the math section

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

  4. xBabyGirlx
    • 2 years ago
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    yeah i dont care

  5. kasim17
    • 2 years 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
    • 2 years ago
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    belong in math

  7. hereweg0
    • 2 years ago
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    hmm nice haha

  8. Andy454
    • 2 years ago
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    this is science....

  9. xBabyGirlx
    • 2 years ago
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    Thanks kasim17

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