So in class I had to go up on the board and solve this math problem:
S=(n/2)(a+l) and i had to get l alone on one side of the equation.
I multiplied each side by 2/n so I would cancel out the n/2
(2S)/n=a+l then I subtracted "a"so in the end I ended up with (2S/n)-a=l
My teacher said it was wrong and said the correct answer would be (2s-na)/n=l
I want to know if my answer would have been ok too. Thanks.
S=(n/2)(a+l) and i had to get l alone on one side of the equation.
I multiplied each side by 2/n so I would cancel out the n/2
(2S)/n=a+l then I subtracted "a"so in the end I ended up with (2S/n)-a=l
My teacher said it was wrong and said the correct answer would be (2s-na)/n=l
I want to know if my answer would have been ok too. Thanks.
-
I got the same thing as you :D
Divide S by (n/2)
subtract a from both sides, and you get S/(n/2) - a = I .
The two goes on top so it becomes (S2/n) - a = I
Both your answer and the teachers are correct, just obtained in different ways. Talk to your teacher about it, your method was correct.
Divide S by (n/2)
subtract a from both sides, and you get S/(n/2) - a = I .
The two goes on top so it becomes (S2/n) - a = I
Both your answer and the teachers are correct, just obtained in different ways. Talk to your teacher about it, your method was correct.
-
The two equations are identical. Both are correct.
-
your answer and the teacher's answer are equivalent. sorry your teacher didn't see that.