-4b+3(3+7b)=-4+4b

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Solution for -4b+3(3+7b)=-4+4b equation: 


Simplifying
-4b + 3(3 + 7b) = -4 + 4b
-4b + (3 * 3 + 7b * 3) = -4 + 4b
-4b + (9 + 21b) = -4 + 4b

Reorder the terms:
9 + -4b + 21b = -4 + 4b

Combine like terms: -4b + 21b = 17b
9 + 17b = -4 + 4b

Solving
9 + 17b = -4 + 4b

Solving for variable 'b'.

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

Add '-4b' to each side of the equation.
9 + 17b + -4b = -4 + 4b + -4b

Combine like terms: 17b + -4b = 13b
9 + 13b = -4 + 4b + -4b

Combine like terms: 4b + -4b = 0
9 + 13b = -4 + 0
9 + 13b = -4

Add '-9' to each side of the equation.
9 + -9 + 13b = -4 + -9

Combine like terms: 9 + -9 = 0
0 + 13b = -4 + -9
13b = -4 + -9

Combine like terms: -4 + -9 = -13
13b = -13

Divide each side by '13'.
b = -1

Simplifying
b = -1

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