Question Number 187054 by Humble last updated on 13/Feb/23

Commented by mr W last updated on 13/Feb/23

$${do}\:{you}\:{see}\:{an}\:{equation}? \\ $$
Commented by Frix last updated on 13/Feb/23

$$\mathrm{Solve}\:\mathrm{5},\:\mathrm{hence}\:\mathrm{find}\:{k} \\ $$