2.9+0.5(n-9)=4.5

Solution for 2.9+0.5(n-9)=4.5 equation:

Simplifying
2.9 + 0.5(n + -9) = 4.5

Reorder the terms:
2.9 + 0.5(-9 + n) = 4.5
2.9 + (-9 * 0.5 + n * 0.5) = 4.5
2.9 + (-4.5 + 0.5n) = 4.5

Combine like terms: 2.9 + -4.5 = -1.6
-1.6 + 0.5n = 4.5

Solving
-1.6 + 0.5n = 4.5

Solving for variable 'n'.

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

Add '1.6' to each side of the equation.
-1.6 + 1.6 + 0.5n = 4.5 + 1.6

Combine like terms: -1.6 + 1.6 = 0.0
0.0 + 0.5n = 4.5 + 1.6
0.5n = 4.5 + 1.6

Combine like terms: 4.5 + 1.6 = 6.1
0.5n = 6.1

Divide each side by '0.5'.
n = 12.2

Simplifying
n = 12.2