6+s=21

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Solution for 6+s=21 equation: 


Simplifying
6 + s = 21

Solving
6 + s = 21

Solving for variable 's'.

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

Add '-6' to each side of the equation.
6 + -6 + s = 21 + -6

Combine like terms: 6 + -6 = 0
0 + s = 21 + -6
s = 21 + -6

Combine like terms: 21 + -6 = 15
s = 15

Simplifying
s = 15

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