[s+12]=15

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Solution for [s+12]=15 equation: 


Simplifying
[s + 12] = 15

Reorder the terms:
[12 + s] = 15

Remove brackets around [12 + s]
12 + s = 15

Solving
12 + s = 15

Solving for variable 's'.

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

Add '-12' to each side of the equation.
12 + -12 + s = 15 + -12

Combine like terms: 12 + -12 = 0
0 + s = 15 + -12
s = 15 + -12

Combine like terms: 15 + -12 = 3
s = 3

Simplifying
s = 3

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