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Jobisdone [24]
3 years ago
14

S=

align="absmiddle" class="latex-formula">
(a+l) solve for a
Mathematics
1 answer:
dmitriy555 [2]3 years ago
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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