42+z=81

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Solution for 42+z=81 equation: 


Simplifying
42 + z = 81

Solving
42 + z = 81

Solving for variable 'z'.

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

Add '-42' to each side of the equation.
42 + -42 + z = 81 + -42

Combine like terms: 42 + -42 = 0
0 + z = 81 + -42
z = 81 + -42

Combine like terms: 81 + -42 = 39
z = 39

Simplifying
z = 39

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