4.2=-log(x)

Solution for 4.2=-log(x) equation:

Simplifying
4.2 = -1log(x)

Multiply glo * x
4.2 = -1glox

Solving
4.2 = -1glox

Solving for variable 'g'.

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

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

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

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

Combine like terms: 4.2 + -4.2 = 0.0
0.0 + glox = 0 + -4.2
glox = 0 + -4.2

Combine like terms: 0 + -4.2 = -4.2
glox = -4.2

Divide each side by 'lox'.
g = -4.2l-1o-1x-1

Simplifying
g = -4.2l-1o-1x-1