81-3x=100

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Solution for 81-3x=100 equation: 


Simplifying
81 + -3x = 100

Solving
81 + -3x = 100

Solving for variable 'x'.

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

Add '-81' to each side of the equation.
81 + -81 + -3x = 100 + -81

Combine like terms: 81 + -81 = 0
0 + -3x = 100 + -81
-3x = 100 + -81

Combine like terms: 100 + -81 = 19
-3x = 19

Divide each side by '-3'.
x = -6.333333333

Simplifying
x = -6.333333333

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