15=3-b

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Solution for 15=3-b equation:


Simplifying
15 = 3 + -1b

Solving
15 = 3 + -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.
15 + b = 3 + -1b + b

Combine like terms: -1b + b = 0
15 + b = 3 + 0
15 + b = 3

Add '-15' to each side of the equation.
15 + -15 + b = 3 + -15

Combine like terms: 15 + -15 = 0
0 + b = 3 + -15
b = 3 + -15

Combine like terms: 3 + -15 = -12
b = -12

Simplifying
b = -12

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