$$c=\frac{8}{0,6}+\frac{7}{6}$$
$c=14,5$
$$c=\frac{80}{6}+\frac{7}{6}$$
$$c=\frac{40}{3}+\frac{7}{6}$$
$$c=\frac{80+7}{6}$$
$$c=\frac{87}{6}$$
$$c=\frac{29}{2}$$
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$c≔14,5$