Question

Combine like terms.

9 + 3x – 9x + 16

A.
18x + 3x + 16

B.
19x

C.
25 – 6x

D.
3x + 16

Answer 1

@rishavraj

Answer 2

I think it is C

Answer 3

you have 9 + 3x – 9x + 16

you have numbers, and algebraic terms

you want to combine the numbers, and combine the algebraic terms

addition and subtraction is commutative so this means

9+3x-9x +16
can be written in any order so you can rewrite it to be

9 +16 +3x - 9x


so to combine them you are going to combine the number

9+16

you are going to combine the algebraic terms
3x-9x

then you will add your answers together so

9+16=25

3x-9x= -6x


25 + -6x
becomes

25 - 6x