-3(2b-7)=3b+21-3b

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Solution for -3(2b-7)=3b+21-3b equation: 


Simplifying
-3(2b + -7) = 3b + 21 + -3b

Reorder the terms:
-3(-7 + 2b) = 3b + 21 + -3b
(-7 * -3 + 2b * -3) = 3b + 21 + -3b
(21 + -6b) = 3b + 21 + -3b

Reorder the terms:
21 + -6b = 21 + 3b + -3b

Combine like terms: 3b + -3b = 0
21 + -6b = 21 + 0
21 + -6b = 21

Add '-21' to each side of the equation.
21 + -21 + -6b = 21 + -21

Combine like terms: 21 + -21 = 0
0 + -6b = 21 + -21
-6b = 21 + -21

Combine like terms: 21 + -21 = 0
-6b = 0

Solving
-6b = 0

Solving for variable 'b'.

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

Divide each side by '-6'.
b = 0

Simplifying
b = 0

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