1-4z=21

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Solution for 1-4z=21 equation: 


Simplifying
1 + -4z = 21

Solving
1 + -4z = 21

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 + -4z = 21 + -1

Combine like terms: 1 + -1 = 0
0 + -4z = 21 + -1
-4z = 21 + -1

Combine like terms: 21 + -1 = 20
-4z = 20

Divide each side by '-4'.
z = -5

Simplifying
z = -5

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