25=12+b

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Solution for 25=12+b equation:


Simplifying
25 = 12 + b

Solving
25 = 12 + b

Solving for variable 'b'.

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

Add '-1b' to each side of the equation.
25 + -1b = 12 + b + -1b

Combine like terms: b + -1b = 0
25 + -1b = 12 + 0
25 + -1b = 12

Add '-25' to each side of the equation.
25 + -25 + -1b = 12 + -25

Combine like terms: 25 + -25 = 0
0 + -1b = 12 + -25
-1b = 12 + -25

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

Divide each side by '-1'.
b = 13

Simplifying
b = 13

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