9b+3b-b-9b=18

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Solution for 9b+3b-b-9b=18 equation: 


Simplifying
9b + 3b + -1b + -9b = 18

Combine like terms: 9b + 3b = 12b
12b + -1b + -9b = 18

Combine like terms: 12b + -1b = 11b
11b + -9b = 18

Combine like terms: 11b + -9b = 2b
2b = 18

Solving
2b = 18

Solving for variable 'b'.

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

Divide each side by '2'.
b = 9

Simplifying
b = 9

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