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BentleyMommy12
solve using two different methods. explain which method you found to be more efficient. B. 7x-3y=20 5x+3y=16
- 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
Elimination is the 1st method u used & Substitution is the 2nd method