n+7+n+2n-12+3n+4 Solve for n? or symplfy?
commutative property of addition states that you can rearrage the problem
n+n+3n+2n-12+7+4
Combine like terms
7n-23 If you were symplying you would stop here.
If not you solve for n
7n-23=0
7n=23
n=23/7
hope this helps!! :D