How do you combine like terms in -3+ 7x + 4+ ( - 9x ) ?

1 Answer
May 14, 2017

Answer: 1-2x

Explanation:

We can only combine (add/subtract) terms with the same variable of the same degree. Here, -3 and 4 are both constants (no variable) and 7x and -9x have the same variable (x) to the first degree.

Therefore,
-3+7x+4-9x
By rearranging:
=-3+4+7x-9x
=1-2x