s-13=-21

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Solution for s-13=-21 equation: 


Simplifying
s + -13 = -21

Reorder the terms:
-13 + s = -21

Solving
-13 + s = -21

Solving for variable 's'.

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

Add '13' to each side of the equation.
-13 + 13 + s = -21 + 13

Combine like terms: -13 + 13 = 0
0 + s = -21 + 13
s = -21 + 13

Combine like terms: -21 + 13 = -8
s = -8

Simplifying
s = -8

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