Adding linear expressions is similar to simplifying expressions in that both operations involve combining like terms. In both cases, the goal is to reduce the number of terms in the expression by combining terms with the same variable and coefficient. For example, when adding the linear expressions 3x + 5x, the like terms (3x and 5x) can be combined to form 8x. Similarly, when simplifying the expression 3x + 5x, the like terms can be combined to form 8x.
