Question

Please help me

Make n and l subject of the formula

`s = (n)/(2) (a + l)`
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Answer 1

Explanation:

`S = (n)/(2) (a+l)\\2s = n(a+l)\\2s = na +nl\\(2s)/(a+l) = n+n\\2n = (2s)/(a+l)\\n = ((2s)/(a+l))/2\\n = (2s)/(2a+2l)`

To Make n subject of the formula

Step 1

: Cross multiply

Step 2 :

Use n to open the bracket

Step 3 :

Divide both sides by a +l to make n on one side of the equation

Step 4 :

Evaluate n+n = 2n

Divide both sides of the equation by 2

To make l the subject of the formula ,

Step 1 : cross multiply

Step 2 :

Use n to open the bracket

Step 3 :

Move na to the other side of the equation to isolate l

Step 4 : Divide both sides of the equation by n

`S = (n)/(2) (a+l)\\2s = n(a+l)\\2s = na +nl\\\\2s - na = nl\\l = (2s-na)/(n) \\`

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