z+31=13

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Solution for z+31=13 equation: 


Simplifying
z + 31 = 13

Reorder the terms:
31 + z = 13

Solving
31 + z = 13

Solving for variable 'z'.

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

Add '-31' to each side of the equation.
31 + -31 + z = 13 + -31

Combine like terms: 31 + -31 = 0
0 + z = 13 + -31
z = 13 + -31

Combine like terms: 13 + -31 = -18
z = -18

Simplifying
z = -18

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