Question 306778
Given: {{{7.6^(X-1) = 431}}}
Take the natural log of both sides
{{{(X-1)*ln(7.6) = ln(431)}}}
Divide both sides by ln(7.6)
{{{X-1 = (ln(431))/(ln(7.6))}}}
Add 1 to both sides
{{{highlight(X = (ln(431))/(ln(7.6)) + 1)}}}
{{{highlight_green(X = 3.991)}}} (rounded)