Problem:
Solution:
let the expression
-10a -9n + 16-30 + 3n + 15 a + 50 + a =
Putting together similar terms we have
(-10a +15a+a) + (-9n+3n ) + (16-30+50) =
this is equivalent to:
(6a) + (-6n) + (36)
this is equivalent to
6a -6n+36
then, the correct answer is:
6a -6n+36