z+21=17

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Solution for z+21=17 equation: 


Simplifying
z + 21 = 17

Reorder the terms:
21 + z = 17

Solving
21 + z = 17

Solving for variable 'z'.

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

Add '-21' to each side of the equation.
21 + -21 + z = 17 + -21

Combine like terms: 21 + -21 = 0
0 + z = 17 + -21
z = 17 + -21

Combine like terms: 17 + -21 = -4
z = -4

Simplifying
z = -4

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