0.3-1.5=0.4-0.2n+.5

Solution for 0.3-1.5=0.4-0.2n+.5 equation:

Simplifying
0.3 + -1.5 = 0.4 + -0.2n + 0.5

Combine like terms: 0.3 + -1.5 = -1.2
-1.2 = 0.4 + -0.2n + 0.5

Reorder the terms:
-1.2 = 0.4 + 0.5 + -0.2n

Combine like terms: 0.4 + 0.5 = 0.9
-1.2 = 0.9 + -0.2n

Solving
-1.2 = 0.9 + -0.2n

Solving for variable 'n'.

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

Add '0.2n' to each side of the equation.
-1.2 + 0.2n = 0.9 + -0.2n + 0.2n

Combine like terms: -0.2n + 0.2n = 0.0
-1.2 + 0.2n = 0.9 + 0.0
-1.2 + 0.2n = 0.9

Add '1.2' to each side of the equation.
-1.2 + 1.2 + 0.2n = 0.9 + 1.2

Combine like terms: -1.2 + 1.2 = 0.0
0.0 + 0.2n = 0.9 + 1.2
0.2n = 0.9 + 1.2

Combine like terms: 0.9 + 1.2 = 2.1
0.2n = 2.1

Divide each side by '0.2'.
n = 10.5

Simplifying
n = 10.5