13-(-s)=25

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Solution for 13-(-s)=25 equation:


Simplifying
13 + -1(-1s) = 25

Remove parenthesis around (-1s)
13 + -1 * -1s = 25

Multiply -1 * -1
13 + 1s = 25

Solving
13 + 1s = 25

Solving for variable 's'.

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

Add '-13' to each side of the equation.
13 + -13 + 1s = 25 + -13

Combine like terms: 13 + -13 = 0
0 + 1s = 25 + -13
1s = 25 + -13

Combine like terms: 25 + -13 = 12
1s = 12

Divide each side by '1'.
s = 12

Simplifying
s = 12

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