Question 913099


{{{sqrt(y)-13-4=6}}} ...first add {{{-13}}} and {{{-4}}} (recall, you add them as positive numbers just their sum has negative sign)

{{{sqrt(y)-17=6}}} ...now move {{{-17}}} to the right (recall, it will change a sign and become positive)

{{{sqrt(y)=6+17}}}

{{{sqrt(y)=23}}} ...now raise both sides to a power of two

{{{(sqrt(y))^2=23^2}}} ...cancel power of two and sqrt

{{{y=23^2}}}

{{{y=529}}}