-5z-4=21

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Solution for -5z-4=21 equation: 


Simplifying
-5z + -4 = 21

Reorder the terms:
-4 + -5z = 21

Solving
-4 + -5z = 21

Solving for variable 'z'.

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

Add '4' to each side of the equation.
-4 + 4 + -5z = 21 + 4

Combine like terms: -4 + 4 = 0
0 + -5z = 21 + 4
-5z = 21 + 4

Combine like terms: 21 + 4 = 25
-5z = 25

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

Simplifying
z = -5

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