s+25=21

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Solution for s+25=21 equation: 


Simplifying
s + 25 = 21

Reorder the terms:
25 + s = 21

Solving
25 + s = 21

Solving for variable 's'.

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

Add '-25' to each side of the equation.
25 + -25 + s = 21 + -25

Combine like terms: 25 + -25 = 0
0 + s = 21 + -25
s = 21 + -25

Combine like terms: 21 + -25 = -4
s = -4

Simplifying
s = -4

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