What is 2n plus 6 equals 3 plus n?

Answer 1

2n + 6 = 3 + n ; this is an equation of one variable {n}. It can be solved for a value of n:

subtract n fro both sides: 2n + 6 - n = 3 + n - n ---> n + 6 = 3.

subtract 6 from both sides: n + 6 - 6 = 3 - 6 ---> n = -3. You should then substitute n=-3 back into the original to check your work.

2(-3) + 6 = -6 + 6 = 0 | 3 + (-3) = 0, so it checks out.