1. The problem is to solve the equation or system given by "solve all" which is ambiguous, so we interpret it as solving all equations or expressions provided. Since no specific equations are given, we cannot solve any. 2. To solve an equation, we typically isolate the variable using algebraic operations such as addition, subtraction, multiplication, division, factoring, or applying formulas. 3. Without a specific equation or system, no intermediate steps or final answer can be provided. Please provide a specific equation or problem to solve.