-9x-4=81

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Solution for -9x-4=81 equation: 


Simplifying
-9x + -4 = 81

Reorder the terms:
-4 + -9x = 81

Solving
-4 + -9x = 81

Solving for variable 'x'.

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

Add '4' to each side of the equation.
-4 + 4 + -9x = 81 + 4

Combine like terms: -4 + 4 = 0
0 + -9x = 81 + 4
-9x = 81 + 4

Combine like terms: 81 + 4 = 85
-9x = 85

Divide each side by '-9'.
x = -9.444444444

Simplifying
x = -9.444444444

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