12.5+s=21.2

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Solution for 12.5+s=21.2 equation: 


Simplifying
12.5 + s = 21.2

Solving
12.5 + s = 21.2

Solving for variable 's'.

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

Add '-12.5' to each side of the equation.
12.5 + -12.5 + s = 21.2 + -12.5

Combine like terms: 12.5 + -12.5 = 0.0
0.0 + s = 21.2 + -12.5
s = 21.2 + -12.5

Combine like terms: 21.2 + -12.5 = 8.7
s = 8.7

Simplifying
s = 8.7

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