19=z-21

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Solution for 19=z-21 equation:


Simplifying
19 = z + -21

Reorder the terms:
19 = -21 + z

Solving
19 = -21 + z

Solving for variable 'z'.

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

Add '-1z' to each side of the equation.
19 + -1z = -21 + z + -1z

Combine like terms: z + -1z = 0
19 + -1z = -21 + 0
19 + -1z = -21

Add '-19' to each side of the equation.
19 + -19 + -1z = -21 + -19

Combine like terms: 19 + -19 = 0
0 + -1z = -21 + -19
-1z = -21 + -19

Combine like terms: -21 + -19 = -40
-1z = -40

Divide each side by '-1'.
z = 40

Simplifying
z = 40

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