-4x-21=-85

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Solution for -4x-21=-85 equation: 


Simplifying
-4x + -21 = -85

Reorder the terms:
-21 + -4x = -85

Solving
-21 + -4x = -85

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + -4x = -85 + 21

Combine like terms: -21 + 21 = 0
0 + -4x = -85 + 21
-4x = -85 + 21

Combine like terms: -85 + 21 = -64
-4x = -64

Divide each side by '-4'.
x = 16

Simplifying
x = 16

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