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BentleyMommy12

  • 3 years ago

solve using two different methods. explain which method you found to be more efficient. B. 7x-3y=20 5x+3y=16

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  1. enzo274
    • 3 years ago
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    - the first one is to take the addition of both equations. This allows you to solve x. y can be calculated easily after you have x. - the second method is to represent x in the mean of y. I don't remember the Mathematics term so i will do it for you. The first equation gives \[x=(20+3y)\div7 \] take this into the second equation \[5(20+3y)\div7 + 3y = 16\] Of course the first method is much comfortable. Enjoy your math

  2. BentleyMommy12
    • 3 years ago
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    thanks.

  3. Haiqa
    • 2 years ago
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    Elimination is the 1st method u used & Substitution is the 2nd method

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