Question

Can somebody help me solve 8^4v + 5 = 31 ?

Answer 1

$8^{4v}+5=31$
minus 5 both sides
$8^{4v}=26$
take the log₈ of both sides
4v=log₈26
divide both sides by 4
v=(1/4)log₈28

if yo use calculator
go back
$8^{4v}=26$
take ln of both sides
4vln8=ln26
divide both sides by (4ln8)
v=(ln28)/(4ln8)
evaluate
v≈0.40061291017147