1. The problem is to solve an equation or expression by substituting numbers and simplifying step-by-step. 2. First, identify the equation or expression to solve. For example, if the problem is to solve $2x + 3 = 11$, we start by isolating $x$. 3. Use algebraic rules: subtract 3 from both sides to get $2x = 11 - 3$. 4. Simplify the right side: $2x = 8$. 5. Divide both sides by 2 to isolate $x$: $x = \frac{8}{2}$. 6. Simplify the fraction: $x = 4$. 7. The solution is $x = 4$. This method applies to any numerical solving by substituting values and simplifying step-by-step.