Chapter 2 - Equations, Inequalities, and Problem Solving - 2.1 Solving Equations - 2.1 Exercise Set - Page 87: 93

yes; no; it doesn't isolate the variable $t$

Given $-3.5=14t,$ adding $3.5$ to both sides will give an equivalent equation. This though will not be helpful in solving the equation since solving the equation means using the properties of equality to isolate the variable on one side of the equal sign.