1. The problem is to solve the equation or system given by "solve all" which is ambiguous, so we interpret it as solving a general algebraic equation. 2. To solve an algebraic equation, we use the principle of isolating the variable on one side of the equation. 3. For example, if the equation is $ax + b = 0$, the solution is found by subtracting $b$ from both sides and then dividing by $a$: $$x = \frac{-b}{a}$$ 4. This formula works for any linear equation where $a \neq 0$. 5. Without a specific equation, this is the general method to solve for $x$. Final answer: The solution to a linear equation $ax + b = 0$ is $$x = \frac{-b}{a}$$.