21+z=31

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Solution for 21+z=31 equation: 


Simplifying
21 + z = 31

Solving
21 + z = 31

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 = 31 + -21

Combine like terms: 21 + -21 = 0
0 + z = 31 + -21
z = 31 + -21

Combine like terms: 31 + -21 = 10
z = 10

Simplifying
z = 10

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