30=12-s

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Solution for 30=12-s equation:


Simplifying
30 = 12 + -1s

Solving
30 = 12 + -1s

Solving for variable 's'.

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

Add 's' to each side of the equation.
30 + s = 12 + -1s + s

Combine like terms: -1s + s = 0
30 + s = 12 + 0
30 + s = 12

Add '-30' to each side of the equation.
30 + -30 + s = 12 + -30

Combine like terms: 30 + -30 = 0
0 + s = 12 + -30
s = 12 + -30

Combine like terms: 12 + -30 = -18
s = -18

Simplifying
s = -18

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