Question

which expressions are equivalent to 6k+5m+3n?
5m+(6k+3n)
3(2k+n)+5m
none of the above

Answer 1

6K+5M+3N
Let's work with the answers first to see if any of these will match our current expression.
5m + (6k + 3n). This does not work because these will forever have parenthesis, which our regular expression does not have.
3(2k+n)+5m. Distribute-- 6K+3N+5M. This works!