Question Number 206267 by mr W last updated on 10/Apr/24
Commented by mr W last updated on 10/Apr/24
$${if}\:{S}_{\mathrm{1}} +{S}_{\mathrm{2}} +{S}_{\mathrm{3}} =\mathrm{10},\:{find}\:{S}_{\mathrm{7}} +{S}_{\mathrm{8}} +{S}_{\mathrm{9}} =? \\ $$