3b+4b=-8b

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Solution for 3b+4b=-8b equation: 


Simplifying
3b + 4b = -8b

Combine like terms: 3b + 4b = 7b
7b = -8b

Solving
7b = -8b

Solving for variable 'b'.

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

Add '8b' to each side of the equation.
7b + 8b = -8b + 8b

Combine like terms: 7b + 8b = 15b
15b = -8b + 8b

Combine like terms: -8b + 8b = 0
15b = 0

Divide each side by '15'.
b = 0

Simplifying
b = 0

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