Hey there!
(14x - 5x) + 6
= 14x - 5x + 6
COMBINE the LIKE TERMS
= (14x - 5x) + (6)
= 14x - 5x + 6
= 9x + 6
So, basically you had to combine the like terms to get back to the original equation (6 + 9x)
Good luck on your assignment & enjoy your day!
~Amphitrite1040:)