Chapter 2 - Equations, Inequalities, and Problem Solving - 2.1 Solving Equations - 2.1 Exercise Set - Page 87: 101

$9,000$

Using the properties of equality, the value of $ t $ in the given equation, $ t-3590=1820 $, is \begin{array}{l} t-3590+3590=1820+3590 \\\\ t=5410 .\end{array} Hence, $t+3590$ evaluates to \begin{array}{l} 5410+3590 \\\\= 9,000 .\end{array}