3b+5b-4=12

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Solution for 3b+5b-4=12 equation: 


Simplifying
3b + 5b + -4 = 12

Reorder the terms:
-4 + 3b + 5b = 12

Combine like terms: 3b + 5b = 8b
-4 + 8b = 12

Solving
-4 + 8b = 12

Solving for variable 'b'.

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

Add '4' to each side of the equation.
-4 + 4 + 8b = 12 + 4

Combine like terms: -4 + 4 = 0
0 + 8b = 12 + 4
8b = 12 + 4

Combine like terms: 12 + 4 = 16
8b = 16

Divide each side by '8'.
b = 2

Simplifying
b = 2

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