Question 457241
Assume the problem is:
{{{3sqrt(x-9)+ 24 = 30}}}
:
Subtract 24 from both sides
{{{3sqrt(x-9) = 30 - 24}}}
{{{3sqrt(x-9) = 6}}}
:
divide both sides by 3
{{{sqrt(x-9) = 2}}}
:
square both sides
x - 9 = 4
x = 4 + 9
x = 13
:
:
Check solution in the original 
{{{3sqrt(13-9)+ 24 = 30}}}
{{{3sqrt(4)+ 24 = 30}}}
3(2) + 24 = 30