Question

(3d + 9) + (4a+6)=
Ssdddd

Answer 1

4a + 3d + 15

Explanation:

Remove parentheses.

3d + 9 + 4a + 6

Add 9 and 6.

3d + 4a + 15

Reorder 3d and 4a.

4a + 3d + 15