Question

Simplify the expression -2d + -2d - 9 + -9

Answer 1

-4d-18

Explanation:

Answer 2

-4d-18

Explanation:

Combine like terms:

-2d and -2d can combine since they have the same variable of d creating the term of -4d and -9 and -9 can combine to create -18. Put those together and you get the answer above.