5th grade math
posted by casey .
get each variable by itself on one side of the equation.
I'll show you how to work this kind of problem.
You want to get the knowns on one side and the unknown on the other side.
Subtract 23 from both sides.
n = 36.9 - 23.4
n = 13.5
I'll be glad to check your work on the first problem.
Note: you'll need to add 45 to both sides.