Question

Add:
7x, −3x, 5x, −x, −2x

Answer 1

Writing the terms of the given expressions (in the same order) in the form of rows with like terms below each other and adding column-wise, we get:

$$\begin{gathered} 7x \\ -3x \\ 5x \\ -x \\ -2x \end{gathered}$$
_____
$6x$