Question 1086752: Solve for n:
S = n/2 (a + l)
2S = n (2a + 2l)
2S / 2 = 2an + 2ln / 2
S = an + ln
How do I continue? Non-homework. Found 2 solutions by math_helper, MathTherapy:Answer by math_helper(2461) (Show Source):
You can put this solution on YOUR website! <<< Assuming this is what you intended for starting expression, same as S=(n/2)(a+l) ( Rearranged left and right sides, since we're solving for n let's write it on left. ) ( Multiplied both sides by 2. ) ( Divided both sides by a+l. Done. )
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Your 2nd step above has an error: S = (n/2)(a+l) becomes 2S = n(a+l) after multiplying both sides by 2, not 2S=n(2a+2l).
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7/5/17 - I corrected my last two steps, which had an error. Apologies for that.
7/8/17 - Meant to add that the domain restriction must accompany the answer.
You can put this solution on YOUR website! Solve for n:
S = n/2 (a + l)
2S = n (2a + 2l)
2S / 2 = 2an + 2ln / 2
S = an + ln
How do I continue? Non-homework.
<===== l appears to be L, not 1, I guess
n(a + L) = 2S ------ Cross-multiplying
IGNORE all other RIDICULOUS answers!!
