b+9-2b=6

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Solution for b+9-2b=6 equation: 


Simplifying
b + 9 + -2b = 6

Reorder the terms:
9 + b + -2b = 6

Combine like terms: b + -2b = -1b
9 + -1b = 6

Solving
9 + -1b = 6

Solving for variable 'b'.

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

Add '-9' to each side of the equation.
9 + -9 + -1b = 6 + -9

Combine like terms: 9 + -9 = 0
0 + -1b = 6 + -9
-1b = 6 + -9

Combine like terms: 6 + -9 = -3
-1b = -3

Divide each side by '-1'.
b = 3

Simplifying
b = 3

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