.15=.6-1.2n

Solution for .15=.6-1.2n equation:

Simplifying
0.15 = 0.6 + -1.2n

Solving
0.15 = 0.6 + -1.2n

Solving for variable 'n'.

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

Add '1.2n' to each side of the equation.
0.15 + 1.2n = 0.6 + -1.2n + 1.2n

Combine like terms: -1.2n + 1.2n = 0.0
0.15 + 1.2n = 0.6 + 0.0
0.15 + 1.2n = 0.6

Add '-0.15' to each side of the equation.
0.15 + -0.15 + 1.2n = 0.6 + -0.15

Combine like terms: 0.15 + -0.15 = 0.00
0.00 + 1.2n = 0.6 + -0.15
1.2n = 0.6 + -0.15

Combine like terms: 0.6 + -0.15 = 0.45
1.2n = 0.45

Divide each side by '1.2'.
n = 0.375

Simplifying
n = 0.375