4.2=0.8j

Solution for 4.2=0.8j equation:

Simplifying
4.2 = 0.8j

Solving
4.2 = 0.8j

Solving for variable 'j'.

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

Add '-0.8j' to each side of the equation.
4.2 + -0.8j = 0.8j + -0.8j

Combine like terms: 0.8j + -0.8j = 0.0
4.2 + -0.8j = 0.0

Add '-4.2' to each side of the equation.
4.2 + -4.2 + -0.8j = 0.0 + -4.2

Combine like terms: 4.2 + -4.2 = 0.0
0.0 + -0.8j = 0.0 + -4.2
-0.8j = 0.0 + -4.2

Combine like terms: 0.0 + -4.2 = -4.2
-0.8j = -4.2

Divide each side by '-0.8'.
j = 5.25

Simplifying
j = 5.25