c. \( 3 x+1+(-x)-6= \)

To simplify the expression \( 3x + 1 + (-x) - 6 \), first, combine like terms. Start with the \( x \) terms: \( 3x - x = 2x \). Next, combine the constant terms: \( 1 - 6 = -5 \). So, the expression simplifies to \( 2x - 5 \). Don’t forget to check your work! It’s a great habit to go back through your steps. Common mistakes include miscombining terms or forgetting to apply negative signs, but with a bit of practice, you'll be solving similar expressions confidently!