13-31=2s-9

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Solution for 13-31=2s-9 equation:


Simplifying
13 + -31 = 2s + -9

Combine like terms: 13 + -31 = -18
-18 = 2s + -9

Reorder the terms:
-18 = -9 + 2s

Solving
-18 = -9 + 2s

Solving for variable 's'.

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

Add '-2s' to each side of the equation.
-18 + -2s = -9 + 2s + -2s

Combine like terms: 2s + -2s = 0
-18 + -2s = -9 + 0
-18 + -2s = -9

Add '18' to each side of the equation.
-18 + 18 + -2s = -9 + 18

Combine like terms: -18 + 18 = 0
0 + -2s = -9 + 18
-2s = -9 + 18

Combine like terms: -9 + 18 = 9
-2s = 9

Divide each side by '-2'.
s = -4.5

Simplifying
s = -4.5

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