Expand
6 + 18d - 5
Collect like terms
18d + (6 - 5)
Simplify
18d + 1
3(2+6d)-5
Do distributive property first. So 3*2 and 3*6d
3*2 is 6 and 3*6d is 18d
Now its like this: 6+18d-5
Combine like terms
6-5 is 1
so the answer is 1+18d
Hope that helps! :)
