Which expression is equivalent to \( x+6 x-x \) ?

To simplify the expression \( x + 6x - x \), we start by combining like terms. First, we add \( x \) and \( 6x \) which gives us \( 7x \). Then, we subtract \( x \) from \( 7x \), resulting in \( 6x \). Therefore, the expression simplifies to \( 6x \). If you’re looking for a way to double-check your simplification skills, try rewriting the expression and grouping terms differently. For example, you can group \( (x - x) + 6x \) first, leading to \( 0 + 6x \), which reinforces that the final answer is indeed \( 6x \). Debugging your algebraic steps can help prevent common errors in more complex problems!