12-19=b

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Solution for 12-19=b equation:


Simplifying
12 + -19 = b

Combine like terms: 12 + -19 = -7
-7 = b

Solving
-7 = 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.
-7 + -1b = b + -1b

Combine like terms: b + -1b = 0
-7 + -1b = 0

Add '7' to each side of the equation.
-7 + 7 + -1b = 0 + 7

Combine like terms: -7 + 7 = 0
0 + -1b = 0 + 7
-1b = 0 + 7

Combine like terms: 0 + 7 = 7
-1b = 7

Divide each side by '-1'.
b = -7

Simplifying
b = -7

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