-2z-1=9

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Solution for -2z-1=9 equation: 


Simplifying
-2z + -1 = 9

Reorder the terms:
-1 + -2z = 9

Solving
-1 + -2z = 9

Solving for variable 'z'.

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

Add '1' to each side of the equation.
-1 + 1 + -2z = 9 + 1

Combine like terms: -1 + 1 = 0
0 + -2z = 9 + 1
-2z = 9 + 1

Combine like terms: 9 + 1 = 10
-2z = 10

Divide each side by '-2'.
z = -5

Simplifying
z = -5

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