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 one year ago
solve using two different methods. explain which method you found to be more efficient.
B. 7x3y=20
5x+3y=16
 one year ago
solve using two different methods. explain which method you found to be more efficient. B. 7x3y=20 5x+3y=16

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enzo274
 one year ago
Best ResponseYou've already chosen the best response.1 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

Haiqa
 one year ago
Best ResponseYou've already chosen the best response.0Elimination is the 1st method u used & Substitution is the 2nd method
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