s+31=30

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Solution for s+31=30 equation: 


Simplifying
s + 31 = 30

Reorder the terms:
31 + s = 30

Solving
31 + s = 30

Solving for variable 's'.

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

Add '-31' to each side of the equation.
31 + -31 + s = 30 + -31

Combine like terms: 31 + -31 = 0
0 + s = 30 + -31
s = 30 + -31

Combine like terms: 30 + -31 = -1
s = -1

Simplifying
s = -1

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