3+5-2b=12

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Solution for 3+5-2b=12 equation: 


Simplifying
3 + 5 + -2b = 12

Combine like terms: 3 + 5 = 8
8 + -2b = 12

Solving
8 + -2b = 12

Solving for variable 'b'.

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

Add '-8' to each side of the equation.
8 + -8 + -2b = 12 + -8

Combine like terms: 8 + -8 = 0
0 + -2b = 12 + -8
-2b = 12 + -8

Combine like terms: 12 + -8 = 4
-2b = 4

Divide each side by '-2'.
b = -2

Simplifying
b = -2

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