13=25-b

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Solution for 13=25-b equation:


Simplifying
13 = 25 + -1b

Solving
13 = 25 + -1b

Solving for variable 'b'.

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

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

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

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

Combine like terms: 13 + -13 = 0
0 + b = 25 + -13
b = 25 + -13

Combine like terms: 25 + -13 = 12
b = 12

Simplifying
b = 12

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