3 years ago

S=

align="absmiddle" class="latex-formula">
(a+l) solve for a

1 answer:

8 0

$\bf S=\cfrac{n}{2}(a+I)\implies S=\cfrac{n(a+I)}{2}\implies 2S=n(a+I)\implies \stackrel{\textit{distributing}}{2S=na+nI} \\\\\\ 2S-nI=na\implies \cfrac{2S-nI}{n}=a$

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$\quad \huge \quad \quad \boxed{ \tt \:Answer }$

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