3n+4.5-n=10.5

Solution for 3n+4.5-n=10.5 equation:

Simplifying
3n + 4.5 + -1n = 10.5

Reorder the terms:
4.5 + 3n + -1n = 10.5

Combine like terms: 3n + -1n = 2n
4.5 + 2n = 10.5

Solving
4.5 + 2n = 10.5

Solving for variable 'n'.

Move all terms containing n to the left, all other terms to the right.

Add '-4.5' to each side of the equation.
4.5 + -4.5 + 2n = 10.5 + -4.5

Combine like terms: 4.5 + -4.5 = 0.0
0.0 + 2n = 10.5 + -4.5
2n = 10.5 + -4.5

Combine like terms: 10.5 + -4.5 = 6
2n = 6

Divide each side by '2'.
n = 3

Simplifying
n = 3