3b-7b=20

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Solution for 3b-7b=20 equation: 


Simplifying
3b + -7b = 20

Combine like terms: 3b + -7b = -4b
-4b = 20

Solving
-4b = 20

Solving for variable 'b'.

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

Divide each side by '-4'.
b = -5

Simplifying
b = -5

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