Solve for: (30-(-9)) * 2=30 * 2+x * 2

Expression: $\sqrt{ t }-3=11$

Move the constant to the right-hand side and change its sign

$\sqrt{ t }=11+3$

Add the numbers

$\sqrt{ t }=14$

Square both sides of the equation

$t=196$

Check if the given value is the solution of the equation

$\sqrt{ 196 }-3=11$

Simplify the expression

$11=11$

The equality is true, therefore $t=196$ is a solution of the equation

$t=196$