-b+-3b+9b=15

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Solution for -b+-3b+9b=15 equation: 


Simplifying
-1b + -3b + 9b = 15

Combine like terms: -1b + -3b = -4b
-4b + 9b = 15

Combine like terms: -4b + 9b = 5b
5b = 15

Solving
5b = 15

Solving for variable 'b'.

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

Divide each side by '5'.
b = 3

Simplifying
b = 3

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