Question 308002
{{{sqrt(5x)-12=13}}} if {{{Y=(sqrt(5x))}}} then
{{{Y-12=13}}}
{{{Y=25}}}
{{{sqrt(5x)=25}}} square both sides
{{{5x=625}}}divide by 5
{{{x=125}}}
Check
{{{sqrt(5x)-12=13}}}
{{{sqrt(5(125))-12=13}}}
{{{sqrt(625)-12=13}}}
{{{25-12=13}}}
{{{13=13}}}
correct