13-4s+s=25

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Solution for 13-4s+s=25 equation: 


Simplifying
13 + -4s + s = 25

Combine like terms: -4s + s = -3s
13 + -3s = 25

Solving
13 + -3s = 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 + -3s = 25 + -13

Combine like terms: 13 + -13 = 0
0 + -3s = 25 + -13
-3s = 25 + -13

Combine like terms: 25 + -13 = 12
-3s = 12

Divide each side by '-3'.
s = -4

Simplifying
s = -4

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