4.2=ln(X)

Solution for 4.2=ln(X) equation:

Simplifying
4.2 = ln(X)

Multiply ln * X
4.2 = lnX

Solving
4.2 = lnX

Solving for variable 'l'.

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

Add '-1lnX' to each side of the equation.
4.2 + -1lnX = lnX + -1lnX

Combine like terms: lnX + -1lnX = 0
4.2 + -1lnX = 0

Add '-4.2' to each side of the equation.
4.2 + -4.2 + -1lnX = 0 + -4.2

Combine like terms: 4.2 + -4.2 = 0.0
0.0 + -1lnX = 0 + -4.2
-1lnX = 0 + -4.2

Combine like terms: 0 + -4.2 = -4.2
-1lnX = -4.2

Divide each side by '-1nX'.
l = 4.2n-1X-1

Simplifying
l = 4.2n-1X-1