#### Answer

20 is a solution for n.

#### Work Step by Step

To determine if a number is a solution for an equation, substitute the number for the variable and simplify to see if the equation is true.
$2(26)-30-10$
$52-30=10$
$22=10\ X$
$2(40)-30-10$
$80-30=10$
$50=10\ X$
$2(20)-30-10$
$40-30=10$
$10=10\checkmark$