-4.2=-2.1n

Solution for -4.2=-2.1n equation:

Simplifying
-4.2 = -2.1n

Solving
-4.2 = -2.1n

Solving for variable 'n'.

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

Add '2.1n' to each side of the equation.
-4.2 + 2.1n = -2.1n + 2.1n

Combine like terms: -2.1n + 2.1n = 0.0
-4.2 + 2.1n = 0.0

Add '4.2' to each side of the equation.
-4.2 + 4.2 + 2.1n = 0.0 + 4.2

Combine like terms: -4.2 + 4.2 = 0.0
0.0 + 2.1n = 0.0 + 4.2
2.1n = 0.0 + 4.2

Combine like terms: 0.0 + 4.2 = 4.2
2.1n = 4.2

Divide each side by '2.1'.
n = 2

Simplifying
n = 2