.3n-21=42.105

Solution for .3n-21=42.105 equation:

Simplifying
0.3n + -21 = 42.105

Reorder the terms:
-21 + 0.3n = 42.105

Solving
-21 + 0.3n = 42.105

Solving for variable 'n'.

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

Add '21' to each side of the equation.
-21 + 21 + 0.3n = 42.105 + 21

Combine like terms: -21 + 21 = 0
0 + 0.3n = 42.105 + 21
0.3n = 42.105 + 21

Combine like terms: 42.105 + 21 = 63.105
0.3n = 63.105

Divide each side by '0.3'.
n = 210.35

Simplifying
n = 210.35