SOLUTION: How can I solve this problem? 4c+3(2+c)=4c+6+3c =4c+3c+6

You are given the first two steps.  You are to 
finish simplifying by supplying three more steps.

Original expression given to
simplify:                           4c + 3(2 + c) =

First step (given): Use distributive
principle to remove parentheses       4c + 6 + 3c =

Second step (given):
Put the terms which contain "c"
next to each other in front:          4c + 3c + 6 =

Third step (not given):
Use the distributive law in 
reverse to put c outside a
parentheses with 4 + 3 inside        c(4 + 3) + 6 =

Fourth step (not given):
Add the terms in the parentheses
4 + 3 gives 7                            c(7) + 6 =

Fifth step (not given)
c(7) can be written as 7c                  7c + 6

That is simplified as far as possible.
So that's the final answer.

Edwin