s+21=17

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Solution for s+21=17 equation: 


Simplifying
s + 21 = 17

Reorder the terms:
21 + s = 17

Solving
21 + s = 17

Solving for variable 's'.

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

Add '-21' to each side of the equation.
21 + -21 + s = 17 + -21

Combine like terms: 21 + -21 = 0
0 + s = 17 + -21
s = 17 + -21

Combine like terms: 17 + -21 = -4
s = -4

Simplifying
s = -4

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